This Ain't the Partridge Family XXX (2009)

Keith is going through a dry spell. He's unable to get a date, unwilling to play music and uninspired to write any songs. But Danny has found a cure on the back of Teen Pop Magazine: a secret elixir guaranteed to make anyone instantly fall in lust with the wearer. Keith refuses to try it out out of fear of hair-loss, but all the other members of the Partridge family don't mind trying.