Lady Gaga for the first time on FORBES List

Forbes said that celebrity earnings remain "remarkably resilient, with this year's stars having earned a collective $4.7 billion during the past year, up from $4.1 billion in 2009. Why is that?
Forbes' ranking is a measurement of entertainment-related earnings over the past 12 months as well as exposure in print, television, radio, online, and social media.
Glam pop star Lady Gaga made the list for the first time, taking fourth place with estimated earnings of $62 million. Wow!
Golfer Tiger Woods is the world's fifth most powerful celebrity, despite a sex scandal that took him out of golfing for five months and lost him several lucrative endorsements.

The top ten on the Forbes' 2010 Celebrity 100 list are:

Rank	Name	TV/Radio Rank	Press Rank	Web Rank	Social Rank
1	Oprah Winfrey	315	1	5	5	11
2	Beyonce Knowles	87	9	13	2	15
3	James Cameron	210	21	9	20	81
4	Lady Gaga	62	13	4	1	1
5	Tiger Woods	105	7	6	35	34
6	Britney Spears	64	15	24	3	2
7	U2	130	54	18	11	28
8	Sandra Bullock	56	6	21	17	62
9	Johnny Depp	75	34	22	16	21
10	Madonna	58	16	3	4	33

You can check other celebs on the list here