Jennifer Lopez. Photo / Matt Sayles
Jennifer Lopez (right) has topped the annual Forbes list of the world's 100 most powerful celebrities.
She takes over from fellow pop singer Lady Gaga in a top 10 dominated by women.
The 42-year-old singer, actress and dancer jumped from 50th place on last year's list.
The list measures power by entertainment-related earnings, media visibility and social media popularity.
Forbes estimated Lopez's earnings in the past 12 months at $67.8 million.
Her ranking is powered by her gig as a judge on American Idol, a clothing line, a fragrance and millions of Twitter and Facebook followers.
Winfrey, who has admitted struggling with her OWN TV network after ending The Oprah Winfrey Show last year, kept her number two slot, earning an estimated $215 million.
Canadian pop star Justin Bieber, 18, stayed at number three, earning $71.7 million.
Pop star Rihanna made the list for the first time with estimated earnings of $69.1 million.
TOP 10 Most powerful celebrities
1. Jennifer Lopez
2. Oprah Winfrey
3. Justin Bieber
4. Rihanna
5. Lady Gaga
6. Britney Spears
7. Kim Kardashian
8. Katy Perry
9. Tom Cruise
10. Steven Spielberg
The Australian site cited a 'heightened threat level' as the issue.