Kurt COBAIN and NIRVANA, Kurt Cobain recording in Hilversum Studios, playing Takamine acoustic guitar (Photo by Michel Linssen/Redferns)

Jon Hamm as Don Draper in 'Mad Men' (Courtesy of amc)

Jon Hamm as Don Draper in 'Mad Men' (Courtesy of amc)

Jon Hamm as Don Draper in 'Mad Men' (Courtesy of amc)

Jon Hamm as Don Draper in 'Mad Men' (Courtesy of amc)

Jon Hamm as Don Draper in 'Mad Men' (Courtesy of amc)

Jon Hamm as Don Draper in 'Mad Men' (Courtesy of amc)

Jon Hamm as Don Draper in 'Mad Men' (Courtesy of amc)

Jon Hamm as Don Draper in 'Mad Men' (Courtesy of amc)

Jon Hamm as Don Draper in 'Mad Men' (Courtesy of amc)

Jon Hamm as Don Draper in 'Mad Men' (Courtesy of amc)

Jon Hamm as Don Draper in 'Mad Men' (Courtesy of amc)

Jon Hamm as Don Draper in 'Mad Men' (Courtesy of amc)

Jon Hamm as Don Draper in 'Mad Men' (Courtesy of amc)

Jon Hamm as Don Draper in 'Mad Men' (Courtesy of amc)

Jon Hamm as Don Draper in 'Mad Men' (Courtesy of amc)

Actor Jon Hamm attends the 2014 Film Independent Spirit Awards at Santa Monica Beach on March 1, 2014 in Santa Monica, California. (Photo by Alberto E. Rodriguez/Entertainment/Getty Images)

Jon Hamm (L) and actress Jennifer Westfeldt arrives at the 65th Annual Primetime Emmy Awards held at Nokia Theatre L.A. Live on September 22, 2013 in Los Angeles, California. (Getty)

Jon Hamm Jon Hamm (Courtesy of cbs)

Jon Hamm attends The 2013 ESPY Awards at Nokia Theatre L.A. Live on July 17, 2013 in Los Angeles, California. (Getty)

Jon Hamm and his girlfriend Jennifer Westfeldt take their dog for a walk in West Hollywood, California on April 2. (FameFlynet)

Jon Hamm & Jennifer Westfeldt (Invision/AP Images)

Jon Hamm and Jennifer Westfeldt (Getty)

Jon Hamm (Courtesy of amc)

Jon Hamm prayed for a win at the 5th Annual Hollywood Domino Gala & Tournament, which was sponsored by VnC Cocktails.

Jon Hamm (L) and Jennifer Westfeldt arrive at the 2012 Vanity Fair Oscar Party hosted by Graydon Carter at Sunset Tower on February 26, 2012 in West Hollywood, California. (Photo by Pascal Le Segretain/Getty Images)

Honoree Gigi Hadid (L) and singer Cody Simpson attend The DAILY FRONT ROW 'Fashion Los Angeles Awards' Show at Sunset Tower on January 22, 2015 in West Hollywood, California. (Photo by Jason Kempin/Getty Images for the DAILY FRONT ROW)

Cody Simpson's 18th birthday party on January 10, 2015 (Courtesy of RPB STUDIO, Rony Alwin, WWW.RPBSUTDIO.COM)

Cody Simpson's 18th birthday party on January 10, 2015 (Courtesy of RPB STUDIO, Rony Alwin, WWW.RPBSUTDIO.COM)

Cody Simpson's 18th birthday party on January 10, 2015 (Courtesy of RPB STUDIO, Rony Alwin, WWW.RPBSUTDIO.COM)

Cody Simpson's 18th birthday party on January 10, 2015 (Courtesy of RPB STUDIO, Rony Alwin, WWW.RPBSUTDIO.COM)

Cody Simpson's 18th birthday party on January 10, 2015 (Courtesy of RPB STUDIO, Rony Alwin, WWW.RPBSUTDIO.COM)

Cody Simpson's 18th birthday party on January 10, 2015 (Courtesy of RPB STUDIO, Rony Alwin, WWW.RPBSUTDIO.COM)

Cody Simpson's 18th birthday party on January 10, 2015 (Courtesy of RPB STUDIO, Rony Alwin, WWW.RPBSUTDIO.COM)

Gigi Hadid & Cody Simpson, Dubai, January 1, 2015 (Courtesy of Instagram)

Selena Gomez, Kendall Jenner, Gigi Hadid & Cody Simpson, Dec. 31, 2014 (Courtesy of Instagram)

Gigi Hadid, Cody Simpson & Kendall Jenner, Dubai, January 1, 2014 (Courtesy of Instagram)

Gigi Hadid & Cody Simpson, December 25, 2014 (Courtesy of Instagram)

Cody Simpson, Dec. 6, 2014 (Courtesy of Instagram)

Miley Cyrus & Cody Simpson, Nashville, Dec. 6, 2014 (Courtesy of Instagram)

Miley Cyrus , Patrick Schwarzenegger & Cody Simpson, Nashville, Dec. 6, 2014 (Courtesy of Instagram)

Cody Simpson, Dec. 6, 2014 (Courtesy of Instagram)

Justin Bieber & Cody Simpson (Courtesy of Instagram)

Justin Bieber & Cody Simpson (Courtesy of Instagram)

Cody Simpson and Gigi Hadid walk hand in hand after enjoying a night out at Hakkasan in Beverly Hills, California on November 22, 2014 (FameFlyNet)

Gigi Hadid and Cody Simpson were seen leaving Miley Cyrus's birthday party in West Wollywood, CA on Nov. 22, 2014 (SplashNews)

Gigi Hadid and Cody Simpson were seen leaving Miley Cyrus's birthday party in West Wollywood, CA on Nov. 22, 2014 (SplashNews)

Gigi Hadid & Cody Simpson at Just Jared's Homecoming Dance in LA, Nov. 20, 2014 (Courtesy of Todd Williamson/AP Images and John Shearer/AP Images)

Gigi Hadid & Cody Simpson at Just Jared's Homecoming Dance in LA, Nov. 20, 2014 (Courtesy of Todd Williamson/AP Images and John Shearer/AP Images)

Cody Simpson and model Gigi Hadid attend the Sports Illustrated Swimsuit 50 Years of Swim in NYC Celebration at the Sports Illustrated Swimsuit Beach House on February 18, 2014 in New York City. (Photo by Dimitrios Kambouris/Entertainment/Getty Images for Sports Illustrated)

Cody Simpson & Gigi Hadid (Courtesy of Charles William)

Cody Simpson & Gigi Hadid (Courtesy of Charles William)

Cody Simpson on 'Cougar Town' (Courtesy of Instagram)

Gigi Hadid posted on Instagram, June 14, 2014 a pic of her and Cody Simpson (Courtesy of Instagram)

Cody Simpson & Gigi Hadid (Courtesy of Charles William)

Cody Simpson & Gigi Hadid (Courtesy of Charles William)

Cody Simpson & Gigi Hadid (Courtesy of Charles William)

Cody Simpson (Courtesy of Charles William)

Cody Simpson (Courtesy of Charles William)

Cody Simpson (Courtesy of Charles William)

Cody Simpson (Courtesy of Charles William)

Cody Simpson (Courtesy of Charles William)

Cody Simpson (Courtesy of Charles William)

Cody Simpson (Courtesy of Charles William)

Cody Simpson (Courtesy of Charles William)

Cody Simpson (Courtesy of Charles William)

Cody Simpson (Courtesy of Charles William)

Cody Simpson (Courtesy of Twitter)

Cody Simpson (Courtesy of Twitter)

Cody Simpson (Courtesy of Twitter)

Cody Simpson (Courtesy of Twitter)

Cody Simpson (Courtesy of Twitter)

Cody Simpson (Courtesy of Twitter)

Cody Simpson (Courtesy of Twitter)

Cody Simpson (Courtesy of Twitter)

Cody Simpson (Courtesy of Twitter)

Cody Simpson (Courtesy of Twitter)

Cody Simpson (Courtesy of Twitter)

Cody Simpson (Courtesy of Twitter)

Cody Simpson (Courtesy of Twitter)

Cody Simpson (Courtesy of Twitter)

Cody Simpson (Courtesy of Twitter)

Cody Simpson (Courtesy of Twitter)

Cody Simpson (Courtesy of Twitter)

Cody Simpson (Courtesy of Twitter)

Cody Simpson performs at Best Buy Theater on July 18, 2013 in New York City. (Photo by D Dipasupil/Entertainment/Getty Images)

Cody Simpson at Nickelodeon's 26th Annual Kids' Choice Awards held at USC Galen Center in Los Angeles, California on March 23rd, 2013 (FameFlyNet)

Cody Simpson attends iHeartRadio's Nick Radio launch party on October 24, 2013 in New York City. (Photo by Brad Barket/Entertainment/Getty Images)

Cody Simpson performs during 'FOX & Friends' All American Concert Series outside of FOX Studios on July 19, 2013 in New York City. (Photo by Slaven Vlasic/Entertainment/Getty Images)

Cody Simpson performs during 'FOX & Friends' All American Concert Series outside of FOX Studios on July 19, 2013 in New York City. (Photo by Slaven Vlasic/Entertainment/Getty Images)

Cody Simpson attends HUB Network's First Annual Halloween Bash held at The Barker Hangar in Santa Monica, California on October 20th, 2013 (FameFlyNet)

Cody Simpson attends the 'Surfer's Paradise' Album Release Party at Beekman Beer Garden Beach Club on July 16, 2013 in New York City. (Photo by Michael Stewart/FilmMagic)

Cody Simpson performs onstage during CW Network's 2013 Young Hollywood Awards presented by Crest 3D White and SodaStream held at The Broad Stage on August 1, 2013 in Santa Monica, California. (Photo by Kevin Winter/Entertainment/Getty Images for PMC)

Cody Simpson performs at Best Buy Theater on July 18, 2013 in New York City. (Photo by D Dipasupil/Entertainment/Getty Images)

Cody Simpson attends the 27th Annual ARIA Awards 2013 at the Star on December 1, 2013 in Sydney, Australia (FameFlyNet)

Cody Simpson performs at iHeartRadio's Nick Radio launch party on October 24, 2013 in New York City. (Photo by Brad Barket/Entertainment/Getty Images)

Cody Simpson attends the Teen Choice Awards 2013 at Gibson Amphitheatre on August 11, 2013 in Universal City, California. (Photo by Jason Merritt/Entertainment/Getty Images)

Cody Simpson and Kylie Jenner

Cody Simpson and Kylie Jenner (SplashNews)

Cody Simpson and Kylie Jenner (SplashNews)

Cody Simpson and Kylie Jenner (Pacific Coast News)

Kylie Jenner and Cody Simpson are spotted on a movie date as they watched '21 Jump Street' at The Grove in Los Angeles on April 03, 2012 (David Tonnessen/PacificCoastNews.com)

Cody Simpson and Kylie Jenner (Courtesy of Twitter)