Justin Bieber, Katy Perry, Rihanna & more made the cut on HollywoodLife.com's 10 Most Powerful Celebs list! Read on to find out who else made the list!

Power is not measured by how much money or media appearances one Hollywood star makes, but rather by the number of Twitter followers he or she has.

HollywoodLife.com has compiled a list of Hollywood's Top 10 Most Powerful Celebrities in light of Forbes magazine's 'Celebrity 100′ list. Click away and vote below.

(FameFlynet)
(FameFlynet)

#1 Justin Bieber

Twitter followers to date: 21,893,864

#10 Tim Tebow

Twitter followers: 1,615,729

#3 Rihanna

Twitter followers: 18,941,787

#6 Ashton Kutcher

Twitter followers to date: 10,659,146

#5 Selena Gomez

Twitter followers: 11,525,775

#4 Kim Kardashian

Twitter followers to date: 14,678,413

#7 Demi Lovato

Twitter followers to date: 6,903,038

#8 Adele

Twitter followers: 6,346,801

#9 Miley Cyrus

Twitter followers: 5,702,037

#2 Katy Perry

Twitter followers to date: 19,683,120

(Photo: Courtesy of NBC)

(Photo: Courtesy of NBC)

(Photo: Courtesy of NBC)

(Photo: Courtesy of NBC)

(Photo: Courtesy of NBC)

(Photo: Courtesy of NBC)

(Photo: Courtesy of NBC)

(Photo: Courtesy of NBC)

(Photo: Courtesy of NBC)

(Photo: Courtesy of NBC)

(Photo: Courtesy of NBC)

(Photo: Courtesy of NBC)

(Photo: Courtesy of NBC)

Justin Bieber, Katy Perry, Rihanna & more made the cut on HollywoodLife.com's 10 Most Powerful Celebs list! Read on to find out who else made the list!

Power is not measured by how much money or media appearances one Hollywood star makes, but rather by the number of Twitter followers he or she has.

HollywoodLife.com has compiled a list of Hollywood's Top 10 Most Powerful Celebrities in light of Forbes magazine's 'Celebrity 100′ list. Click away and vote below.

(FameFlynet)
(FameFlynet)

#1 Justin Bieber

Twitter followers to date: 21,893,864

#10 Tim Tebow

Twitter followers: 1,615,729

#3 Rihanna

Twitter followers: 18,941,787

#6 Ashton Kutcher

Twitter followers to date: 10,659,146

#5 Selena Gomez

Twitter followers: 11,525,775

#4 Kim Kardashian

Twitter followers to date: 14,678,413

#7 Demi Lovato

Twitter followers to date: 6,903,038

#8 Adele

Twitter followers: 6,346,801

#9 Miley Cyrus

Twitter followers: 5,702,037

#2 Katy Perry

Twitter followers to date: 19,683,120

(Photo: Courtesy of NBC)

(Photo: Courtesy of NBC)

(Photo: Courtesy of NBC)

(Photo: Courtesy of NBC)

(Photo: Courtesy of NBC)

(Photo: Courtesy of NBC)

(Photo: Courtesy of NBC)

(Photo: Courtesy of NBC)

(Photo: Courtesy of NBC)

(Photo: Courtesy of NBC)

(Photo: Courtesy of NBC)

(Photo: Courtesy of NBC)

(Photo: Courtesy of NBC)