[4] Fuzzy supported Electric Juices by touring with Juliana Hatfield, Belly, Buffalo Tom, Velocity Girl and The Posies.
[12][13] From 2001 through 2005, Mancini played guitar for The Count Me Outs, fronted by Mark Perretta (Folk Implosion) with Winston Braman on bass and Mike Savage on drums.
[22][23][24][25] In 2012, Mancini formed “The Monsieurs”, a garage punk band, with Andy Macbain (Tunnel of Love) and drummer Erin King.
[30] Hilken also works as a back-up vocalist, doing sessions with Tanya Donelly (Belly), Juliana Hatfield, Buffalo Tom, and several projects with David Derby (The Dambuilders, Grammercy Arms).
[31] In 2015, Mancini was asked to join “A Band of their Own” (BOTO), an ad hoc group of women musicians including Kay Hanley (Letters to Cleo), Belly's Tanya Donelly and Gail Greenwood, Jen Trynin, Magen Tracy, Jenny Dee and Hilken's bandmate in Fuzzy, Chris Toppin.
BOTO performs at Theo and Paul Epstein's “Hot Stove, Cool Music” for the benefit of the Foundation to Be Named Later in both Boston (in February 2018) and Chicago.
[32] In February 2021, Hilken was asked by the acclaimed punk band Green Day to produce a video for their upcoming single, "Here Comes the Shock".