http://en.wikipedia.org/wiki/Happy_Together_%28song%29#Cover_versions schrieb:
"Happy Together" has been covered by artists as diverse as Weezer, Petula Clark, Captain and Tennille, Jason Donovan, The Nylons, Simple Plan, The Dollyrots, Blue Meanies, Donny Osmond, T.G. Sheppard, Tahiti 80, Filter, MStar, Buck Wild, Flobots and Tally Hall, whose version samples the original. There is also a Spanish cover, sung by Roberto Jordan, called "Juntos y Felices". In 1999, BMI named "Happy Together", with approximately five million performances on American radio, the forty-fourth most-performed song in the USA of the 20th century, placing it in the same league as "Yesterday" by The Beatles and "Mrs. Robinson" by Simon and Garfunkel. Frank Zappa's performance on Fillmore East - June 1971 is especially notable: his band at the time included Turtles vocalists Howard Kaylan and Mark Volman and bassist Jim Pons. Kaylan and Volman also did a reggae remake of the song for the last Flo & Eddie album: Rock Steady With Flo & Eddie. Hugo Montenegro's cover version was released as a single in 1969 and reached #29 on the Billboard Easy Listening chart. More recently, the song has been covered by B.E. Taylor for his latest album, Love Never Fails, and by the Flobots. The song has also been sung by the Red Army Choir and the Leningrad Cowboys, as well as the English rock band Johnny Panic. It was also performed on the show American Idol on February 19, 2008, by David Cook, and on February 20, 2008, by Brooke White. In 2007 the song was used as a sample on the song "Ooh Ooh Baby" from Britney Spears' album Blackout. French pop star, Frank Alamo, also covered the song in 1967 in the French version entitled Heureux Tous Les Deux (Happy Together). On May 5, 2011, it was performed as a group performance by the top 5 contestants on American Idol (season 10).