1. The Black Eyed Peas continued their long run at No. 1 with "Boom Boom Pow."
2. While Green Day pretty much ruled the Alternative Songs chart with "Know Your Enemy."
3. Hannah Montana: The Movie soundtrack and Rick Ross's Deeper Than Rap were among the biggest-selling albums in the country.
4. Justin Bieber not only joined Twitter, but also released his debut single, "One Time."
Check out my single "ONE TIME" on my myspace and spread the word for me. Thanks www.myspace.com/justinbieber
5. Andy Samberg hosted the MTV Movie Awards...
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6. ...and Twilight basically won everything, including Best Movie.
7. It was also at the 2009 MTV Movie Awards that Sacha Baron Cohen, as Bruno, fell ass-up into Eminem's lap, causing Eminem to leave the show mad (FTR: It was all a stunt cooked up by these two stunt queens).
8. Jennifer Hudson's friends confirmed that she was pregnant.
9. While Seal and Heidi Klum announced that they were expecting a baby girl.
10. Prince Harry visited Ground Zero and met with family members of some of the 9/11 victims.
11. No Doubt reunited for the first time in five years and performed on the Today show.
12. Susan Boyle (who was a front-runner) came in second place on Britain’s Got Talent, losing to dance troupe Diversity.
13. Kris Allen won American Idol Season 8.
14. While Brian May said he was thinking of having Adam Lambert join Queen.
15. "Greatest Freak Out Ever" went viral on YouTube:
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16. Chris Pine and Audrina Patridge were rumored to be dating.
17. We also got our very first "maybe they're dating" Rihanna and Drake rumor/gossip.
18. Cynthia Nixon announced that she was engaged to Christine Marinoni.
19. Maggie Gyllenhaal and Peter Sarsgaard got married in Italy.
20. Glee made its debut...
21. ...as did Jonas L.A., on Disney Channel.
22. After 17 years, The Tonight Show With Jay Leno ended (although Jay would be back as host less than a year later).
23. Kristin Cavallari officially confirmed that she would replace Lauren Conrad on The Hills, and that she would be bringing drama to the show.
24. The Met Gala held its annual ball and the theme was The Model as Muse: Embodying Fashion.
25. And Madonna wore the most divisive outfit of the night.
26. First lady Michelle Obama and her mom, Marian Shields Robinson, appeared on the cover of Essence.
27. Marvel announced that they had chosen Chris Hemsworth to play Thor in the upcoming origin movie.
28. X-Men Origins: Wolverine and Star Trek were among the movies released into theaters...
29. ...and so was Up — which gave us one of the most heartbreaking moments in movie history.
