Great cover of Tom Petty by John Mayer:
http://open.spotify.com/track/05cLHUb65Na1jBi9KC2oUT
And Kelly Clarkson´s Already Gone… my god, so good!!
http://open.spotify.com/track/7ceIquYtiTYlgSSm7PqUf9
This track by Black Eyed Peas will get you in a party mood:
http://open.spotify.com/track/70cTMpcgWMcR18t9MRJFjB