Who can deny the impact of "Robsten"? Twilight pair Robert Pattinson and Kristen Stewart have made the Forbes Celebrity 100 list of most powerful stars for the first time — Rob comes in at 50, while Kristen is No. 66. Even more impressive was Lady Gaga, who made her debut on the list at an impressive No. 4, beating out Madonna, who only came in 10th place, but not the beloved Beyoncé, who was second. Meanwhile, heartbreak — and an Oscar — helped bump Sandra Bullock from last year's 92 to No. 8 this year, and Tiger Woods didn't budge from No. 5 despite the controversy surrounding him. Still, the mogul with the most muscle turned out to be Oprah Winfrey, who beat out Angelina Jolie for the top spot this year.