1. B.o.B and Bruno Mars' "Nothin' on You"...
2. ...and Usher and Will.i.am's "OMG" were among the No. 1 songs in the country.
3. Katy Perry released "California Gurls" feat. Snoop Dogg, which was the first single from her upcoming album, Teenage Dream.
4. B.o.B's The Adventures of Bobby Ray and Glee: The Music, The Power of Madonna were among the best-selling albums in the country.
5. The annual Met Gala was held and the theme was "American Woman: Fashioning a National Identity."
6. The event was cohosted by Oprah Winfrey (who arrived with Oscar de la Renta).
7. The White House Correspondents Dinner was held, and President Barack Obama roasted Jay Leno (who was the emcee that year) with the joke, "The only person whose ratings fell more than mine last year is here tonight: It is Jay."
8. Sandra Bullock announced that she had adopted a baby boy.
9. While Hilarie Burton and Jeffrey Dean Morgan announced that they had quietly had a baby a few months earlier.
10. David Boreanaz admitted that he had had an affair.
11. Britney Spears dropped her boyfriend Jason Trawick as her agent to keep it as just a personal relationship, not a professional one.
12. Christina Aguilera took to her website to try to stop the rumors that she was feuding with Lady Gaga.
13. Rumors began to circulate that Dwayne Johnson was in talks to join Fast And Furious 5 (which would later be called Fast Five).
14. The sixth and final season of The Hills had just started, and the cast was all over the tabloids.
15. Joe Jonas and Demi Lovato announced they had broken up — with Demi clarifying on Twitter that it wasn't over the phone.
16. Diff’rent Strokes star Gary Coleman died at age 42 from a brain hemorrhage.
17. Legendary actor Dennis Hopper died at age 74 from complications from metastasized prostate cancer.
18. Lindsay Lohan was fitted with an alcohol-monitoring ankle device as part of her probation (which had been revoked a few days earlier after she missed a court date because she was at the Cannes Film Festival).
19. President Obama announced he had nominated Solicitor General Elena Kagan to the Supreme Court.
20. Conan O'Brien did his first interview since leaving The Tonight Show with 60 Minutes, where he said that he decided to leave the show and NBC because it had become "toxic."
21. Lee DeWyze won the ninth season of American Idol.
22. Law & Order aired its final episode after being on the air for 20 years.
23. Lost ended after six seasons with a very divisive final episode.
24. Iron Man 2 and Shrek Forever After were among the movies released into theaters.
25. And finally, thanks to a Facebook campaign, Betty White hosted a special Mother’s Day–themed episode of SNL.
