Despite undergoing recent hip surgery, which led to the cancelation of most of her tour's remaining concerts earlier this year, 27-year-old Lady Gaga occupied the top slot on Forbes’ list of top-earning celebrities under 30.

The “Poker Face” singer occupied the No. 1 position by raking in an estimated $80 million between June 2012 and June 2013, according to information given by agents, managers, producers and executives, Forbes said.

Lady Gaga, who is currently working on her third studio album, titled “ARTPOP,” would have earned more had she completed her tour, the report said.

Canadian pop star Justin Bieber came in second with $58 million and is one of only three male celebrities to make the list. At 19, he's also the youngest celebrity on the latest list.

Singer-songwriter and DJ Calvin Harris occupied the fourth spot, while “Twilight” actor Taylor Lautner clinched the 10th position. According to the Forbes report, Harris and Lautner earned $46 million and $22 million, respectively, in the year starting June 2012.

Close on Bieber’s heels on the list is country-pop singer Taylor Swift, whose estimated earnings were $55 million, thanks to her album “Red,” which sold 1.2 million copies in its first week alone.

“Those are almost unheard-of numbers in today’s troubled music world,” Dorothy Pomerantz of Forbes wrote, referring to Swift’s success. Endorsement deals with companies such as Diet Coke, Sony and Covergirl magazine also boosted her annual earnings.

Other notable singers who made the cut include Rihanna at No. 5, with $43 million, and Katy Perry, who landed sixth on the list after earning $39 million.

Rihanna was followed by Adele, whose annual earnings amounted to $25 million. Only two female actors made it to the list -- Jennifer Lawrence at No. 8 with $26 million and Kristen Stewart at No. 9 with $22 million, Forbes said.