Through his career has produced for Justin Bieber, Lady Gaga, Post Malone, Miley Cyrus, Demi Lovato, the Rolling Stones, Ozzy Osbourne, Pearl Jam, Iggy Pop and many others.

[8] He briefly attended the Steinhardt School of Culture, Education, and Human Development at NYU's Music Business program.

In 2013, Watt was a founding member and guitarist of the rock band California Breed alongside Glenn Hughes (Deep Purple, Black Sabbath) and Jason Bonham (Foreigner).

[13] Red Hot Chili Peppers' Chad Smith and Queens of the Stone Age's Joey Castillo played drums on the record.

The Earthlings also feature Chad Smith on drums, Chris Chaney on bass, and Josh Klinghoffer on guitar.

[26] He joined Pearl Jam on stage during the band's September 4, 2024 concert at New York City's Madison Square Garden to perform several songs.