The Black Eyed Peas go mainstream and enlist the help of Fergie and i really liked their new sound. My favorite of this one is definitely Hey Mama closely followed by Let's Get It Started (or Let's Get Retarded depending whcih country you're from). Where's the Love and Shut Up also deserve a mention.
Shame they sold out with 2009's The E.N.D..
#4 Songs About Jane - Maroon 5
Maroon 5 burst onto the scene and this a fantasitc album. Highlights are Harder to Breathe, She Will Be Loved, This Love and Sunday Morning.
#3 Franz Ferdinand - Franz Ferdinand
Franz Ferdinand were a band that emerged in Australia while i was overseas, and when i first heard Take Me Out, i was hooked. The Dark of the Matinée, Michael, Darts of Pleasure and Jacqueline are all great songs too, as are the rest of the tracks on this fantastic album.