Cameron Diaz arrives at The 66th Annual Golden Globe Awards at The Beverly Hilton Hotel on January 11, 2009 in Hollywood, California. (Getty)

Jillian Michaels in ‘Shape’ Magazine (Courtesy Of Shape Magazine)

Jillian Michaels in ‘Shape’ Magazine (Courtesy Of Shape Magazine)

Jillian Michaels in ‘Shape’ Magazine (Courtesy Of Shape Magazine)

Jillian Michaels on ‘The Biggest Loser’ (Courtesy Of NBC)

Jillian Michaels on ‘The Biggest Loser’ (Courtesy Of NBC)

Last night, Jillian Michaels and her daughter, Lukensia, celebrated all things Katy Perry, snacking on the singers popchips flavor, katy's kettle corn, while backstage at her Hollywood Bowl concert in Los Angeles.
(Michael Simon / Startraks)

Selma Blair takes son Arthur shopping for healthy foods July 14, 2013. (Pacific Coast News)

Jillian Michaels (Getty)

Jillian Michaels (Getty)

Jillian Michaels (Getty)

Jillian Michaels (Courtesy Of NBC)

Jillian Michaels on ‘The Biggest Loser’ (Courtesy Of NBC)

Jillian Michaels on ‘The Biggest Loser’ (Courtesy Of NBC)

Jillian Michaels on ‘The Biggest Loser’ (Courtesy Of NBC)

Jillian Michaels on ‘The Biggest Loser’ (Courtesy Of NBC)

Jillian Michaels on ‘The Biggest Loser’ (Courtesy Of NBC)

Jillian Michaels on ‘The Biggest Loser’ (Courtesy Of NBC)

Jillian Michaels on ‘The Biggest Loser’ (Courtesy Of NBC)

Jillian Michaels on ‘The Biggest Loser’ (Courtesy Of NBC)

Jillian Michaels on ‘The Biggest Loser’ (Courtesy Of NBC)

Jillian Michaels helped coach this woman which caused controversy on ‘The Biggest Loser’ (Courtesy Of NBC)

Jillian Michaels on ‘The Biggest Loser’ (Courtesy Of NBC)

Jillian Michaels on ‘The Biggest Loser’ (Courtesy Of NBC)

Jillian Michaels on ‘The Biggest Loser’ (Courtesy Of NBC)

Emmy Rossum attends the 4th Annual Critics’ Choice Television Awards at The Beverly Hilton Hotel on June 19, 2014 in Beverly Hills, California. The fuchsia gown is available for pre-order at Moda Operandi. (Photo by Christopher Polk/Getty Images for Critics’ Choice Television Awards).