Smash Mouth is an alternative rock band from San Jose, California that formed in 1994, the band comprises Steve Harwell (lead vocalist), Greg Camp (guitarist/songwriter), Paul De Lisle (bassist), and new drummer since early 2006, Jason Sutter (replacing Michael Urbano, who left due to creative differences). Their hit songs include "Walkin' on the Sun" (1997) and "All Star" (1999).

Focused at times playing "neo-ska" music, the band has adopted retro styles spanning several decades of popular music, as well as performing covers of popular songs such as The Monkees' "I'm a Believer" and War's "Why Can't We Be Friends" as well as cult favorites such as ? and the Mysterians' "Can't Get Enough of You Baby" (though their version owes more to The Colourfield's interpretation; in fact, the band at first believed it was a Colourfield original). Smash Mouth's first album Fush Yu Mang came out in June 1997. This album could be said to be "neo ska". Its top position in the charts was #19 (on Billboard). The promo for this album said that "While the twelve songs on Fush Yu Mang sound like they belong side by side, each has it's own feeling like the very '60's "Walkin' on the Sun," the surf 'n' turf of "Nervous in the Alley," the Buzzcocks like "Pet Names," the Mafia rock of "Padrino," and the fret rock of "Let's Rock"." Smash Mouth's second album Astro Lounge was released two years later, in June 1999. It is the band's most critically and commercially successful album to date. It reached #6 on the Billboard charts and it featured the massive hit All Star.

Smash Mouth released their third album Smash Mouth (Self-Titled) in November 2001. It has been said that this is the band's most experimental album to date. It reached #48 on Billboard charts. Smash Mouth's fourth album Get the Picture?, released in August 2003, wasn't as well-received by fans or the critics as previous albums (it only reached #100 on the Billboard charts). Smash Mouth released a Christmas cover album in November 2005 (The Gift of Rock). Their newest album is called Summer Girl, and, after being delayed for over a year, was released on September 19th, 2006. Smash Mouth's music was used in the film "Shrek" and they starred on-screen as themselves in the turbulent finale of the all-star-comedy "Rat Race", while performing "All Star" on stage during the showdown.

There is also a band named Smashmouth:

Smashmouth was a band formed by guitarist Steve "Smash Mouth" Pedersen, who was also in another band called Slowdown Virginia from Omaha, Nebraska at the time. He recruited bassist Bart Volkmer and drummer Clint Schnase. It was a trio that had grown out of a four-piece called Gravy Train that had originally included Ted Stevens, who had left the band when he moved to Lincoln to attend UNL (and form Polecat). Smashmouth was the first band to feature Pedersen's songwriting skills. In 1995, both Smashmouth and Slowdown Virginia disbanded and formed what is now called Cursive. Pedersen left the band in 1998, to form The White Octave and finally, Criteria.