"Spa Day" is a song from the Season 2 episode "Spa Day" sung by Danny Jacob (with Ferb and Phineas lypsynching). It mixed hip-hop and alternate versions to demonstrate the ultimately popular spa which Phineas and Ferb built. It was first shown as a special preview at Comic-Con 2009 and was included in the Phineas and Ferb: Across the 1st and 2nd Dimensions album and the Phineas and Ferb-ulous: The Ultimate Album.