1. The Black Eyed Peas' "I Gotta Feeling" was No. 1 on the Hot 100 for the entire month.
2. While Linkin Park's "New Divide" continued being the No. 1 alternative song in the country.
3. Daughtry's Leave This Town and Demi Lovato's Here We Go Again were among the biggest-selling albums in the country.
4. Miley Cyrus released her bop-tastic classic "Party in the U.S.A."
5. And she performed the song at the Teen Choice Awards:
View this video on YouTube
6. Also, in case you forgot, the Teen Choice Awards were hosted by the Jonas Brothers...
7. ...and Twilight was the big winner of the night — it took home 10 awards.
8. Emily Blunt and John Krasinski announced that they were engaged.
9. Michael Jackson's death was ruled a homicide.
10. DJ AM died at age 36 from an accidental overdose.
11. Senator Ted Kennedy died at age 77 of brain cancer.
12. Filmmaker John Hughes died of a heart attack at age 59.
13. Sonia Sotomayor was sworn in as a Supreme Court Justice.
14. Kourtney Kardashian announced that she was pregnant with her first child and that Scott Disick was the father.
15. Rumors began to circulate that Bradley Cooper and Jennifer Aniston had broken up, and that he was now dating Renée Zellweger.
16. Rumors were also swirling that Jennifer had moved on to Gerard Butler (the two were filming their movie The Bounty Hunter together at the time).
17. Trace Cyrus called the Jonas Brothers fake in an interview with Details magazine.
18. ABC announced the cast for Season 9 of Dancing with the Stars.
19. The third season of Mad Men premiered...
20. ...and, as part of the promotion, AMC had everyone "Mad Men-ing" themselves (aka making avatars of themselves).
21. Shark Tank made its debut...
22. ...as did Kourtney & Kim Take Miami.
23. Paula Abdul announced on Twitter that she would not be returning to American Idol.
With sadness in my heart, I’ve decided not to return to #IDOL. I’ll miss nurturing all the new talent, but most of all..Cont'd...
24. "Python vs Alligator" was the big viral video everyone was watching and sharing:
View this video on YouTube
25. The Three Wolf Moon T-shirt continued being a huge internet phenomena.
26. Julie & Julia, G.I. Joe: Rise of the Cobra Movie, Inglourious Basterds, and District 9 were among the movies released into theaters.
