"Excess" (track 1) contains backing vocals by Alanis Morissette. Morissette also appeared in another song, "Question", that was never officially released but was leaked via the internet.
"Evolution Revolution Love" (track 2) features Ed Kowalczyk of the American rock band Live singing the vocals for the chorus.
The music for the song "Diss Never" was originally intended for the unreleased song "Question" which featured only Alanis Morissette on vocals throughout the entire track. Morissette's record label, Maverick Records, wouldn't allow the song to be released, although a limited number of advance copies of the album were released in Canada which contained the song.
"#1 Da Woman" (track 6) features Frusciante and band-mate Flea, respectively on guitar/chorus vocals and bass. It also features Josh Klinghoffer, current Red Hot Chili Peppers guitarist on drums. This song contains an interpolation of the title song for the TV series Wonder Woman. It is used by professional wrestler Cheerleader Melissa as her entrance theme.
"Something in the Way" (track 10) is a cover of the song originally performed by Nirvana on their album Nevermind.
"Five Days" (track 11) contains guest vocals by Cyndi Lauper.
"Your Name" is a version of "Under the Bamboo Tree", written by Bob Cole.