This first clip is from the children's show Pancake Mountain. The Flaming Lip joins Rufus on a duet of our favorite guilty pleasure "We Built This City." Really, we love it even though it's the "worst song ever." [videoembed size="full_width" alignment="center"][/videoembed] At The Flaming Lips' Hammerstein show on 9/24, the band decided to mix up their usual, aliens-and-santas confetti extravaganza ...