Forbes magazine just revealed their list of top-earning celebs under 30 and just how much they're estimated to have earned in 2012 alone. 1. Lady Gaga - $80 million 2. Justin Bieber - $58 million 3. Taylor Swift - $55 million 4. Calvin Harris - $46 million 5. Rihanna - $43 million 6. Katy Perry - $39 million 7. Jennifer Lawrence - $26 million 8. Adele - $25 million 9. Kristen Stewart - $22 million 10. Taylor Lautner - $22 million