Lady Gaga made bank in the last one year. She has been listed as the richest celeb under the age of 30 in the US.
Forbes calculated their earnings between June 2012 and June 2013.
Justin Bieber also made the list at number 2.
Bieber now has the highest followers on twitter with 42 million followers, and Gaga at number 2 with 39 million followers.
See the full Forbes' list below...
