Everyone loves a cover song, and the Foo Fighters have been keeping their fans happy all summer long on their latest tour.At their Edinburgh, Scotland show on Tuesday, the band busted out a cover of The Vaselines’ “Molly’s Lips," a song Nirvana covered regularly, but was a first for the Foo Fighters. Nirvana first covered the song in 1991, and it appeared on their 1992 album "Incesticide."Meanwhile, the Foo Fighters have been keeping their fans guessing, At their Milton Keynes, England show on Sept. 5, the band covered Queen and David Bowie’s 1981 hit “Under Pressure," and were joined onstage by Queen's Roger Taylor and Led Zeppelin's John Paul Jones. Also on HuffPost:For a constant stream of entertainment news and discussion, follow HuffPost Entertainment on Viber. — This feed and its contents are the property of The Huffington Post, and use is subject to our terms. It may be used for personal consumption, but may not be distributed on a website.