This Los Angeles party-hop duo can’t decide if they want to rhyme like the Beastie Boys or booty-croon like Taio Cruz. So on their second album (which includes the hit “Party Rock Anthem”), they do both, making for a disc of brain-cell-depleting jams. MC-DJs Redfoo and Sky Blu turn in some skillful hip-hop – see “Take It to the Hole,” featuring Busta Rhymes – but also get seriously stupid, rapping about spanking girls and bathing in champagne, over a cheesy pastiche of Eighties synths and pounding beats. LMFAO have, however, penned “Hot Dog,” the greatest tune about blowing off a diet for a late-night frankfurter.

Listen to "Party Rock Anthem":

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“Is It True”

As the British Invasion reached its peak in 1964, Brenda Lee went from Nashville to London to record one of her hardest-rocking hits, her perky vocal backed by a stuttering, squalling guitar. That guitar was played by session musician Jimmy Page, yet to skyrocket to fame with first the Yardbirds and then Led Zeppelin. "She said to me, 'I've come here to make a record with the British sound,'" remembered producer Mickie Most. "She felt she wouldn't get the same sound in Nashville because they're only just catching up on the British beat group sound of about six months ago."