Malin Akerman With The Petalstones
The eco-friendly actress jams with her band, which was once called Ozono. They're performing at the Environmental Media Awards this weekend, and she's hosting, and you can watch all that live on E! Online.
Billy Bob Thornton With The Boxmasters
Billy Bob is no stranger to controversy and his band was no exception. After calling his Canadian audience "mashed potatoes with no gravy" in 2008, Billy and his band took their tour to the U.S.
Bruce Willis & The Accelerators
One of the band's biggest bookings was in 2003 when Bruce sang for the troops in Iraq as part of the USO tour.
Cory Monteith With Bonnie Dune
It only seems natural that Glee hottie Cory Monteith would be in a band! He plays drums for the group who plans to hit the studio in Fall 2012!
Dennis Quaid & The Sharks
Who knew Dennis had a great voice? He sings and plays guitar for his band of buddies.
Gary Sinise With Lt. Dan Band
Who could forget Sinise's character, Lt. Dan, from Forrest Gump?! Appropriately, the band often performs for charities and non-profit organizations including the USO and Operation Iraqi Children.
Adrian Grenier With Kid Friendly and The Honey Brothers
One isn't enough. Adrian is actually a member of two bands: Kid Friendly (where he is a lead singer) and The Honey Brothers (who he plays drums for).
Jack Black With Tenacious D
This band's musical style is often described as "mock rock," but they've released three albums and been a musical guest on SNL, the 2006 MTV Video Music Awards and VH1's Rock Honors.
Jackson Rathbone With 100 Monkeys
In 2012, the band was still touring, but Jackson had decided to take a leave of absence.
Jada Pinkett-Smith With Wicked Widsom
Better known as "Jada Koren" when she was the lead singer of this metal band, performing with them as recently as 2002.
Jared Leto With 30 Seconds to Mars
The Hollywood hottie has been pretty successful with his band, which he originally formed with his brother, Shannon, in 1998.
Juliette Lewis With Juliette and the New Romantiques
Was with Juliette and the Licks until forming The New Romantiques and releasing Terra Incognita in 2009.
Keanu Reeves With Dogstar
The Matrix star played bass guitar and sang backup vocals for his band, which released two albums.
Kevin Bacon With The Bacon Brothers
The brothers have been making music together since they were kids, but didn't make it official until forming the band in 1995. They've appeared on several film soundtracks, including The Woodsman and Red Betsy.
Kevin Costner and the Modern West
Kevin's wife actually urged him to form this rock/country fusion. They released their debut album in 2008.
Maya Rudolph With The Rentals
Yep, it's true! Maya played keyboard and sang backup vocals on the group's early tours in the '90s.
Michael Cera With Mister Heavenly
Michael rocked with this indie rock group until August 2011, right before they released their debut album, Out of Love.
Ricky Gervais With Seona Dancing
Too cool for school. Ricky formed this band in 1982 with pal Bill Macrae during his final year at UCL.
Russell Crowe & The Ordinary Fear of God
After dissolving his old band, 30 Odd Foots of Grunts, Russell formed this group, which successfully sold out their Australian tour in 2005.
Ryan Gosling With Dead Man’s Bones
Didn't know Gosling was in a band? Maybe because he performs under the alias "baby goose." Isn't that sweet?
Steve Martin and the Steep Canyon Rangers
Every band needs a banjo player and Steve came through for his musical cronies.
Steven Seagal & Thunderbox
Steven spent the summer of 2006 touring with the band to support his second album, Mojo Priest.
Taylor Momsen With The Pretty Reckless
Taylor writes, sings and plays guitar for this musical group. Her first tour was in 2009 when they opened for The Veronicas.
Zooey Deschanel With She & Him
Zooey shows off her many musical abilities in her band, which released their first album in 2008, chiming in on vocals, piano and ukelele.