Destiny's Child
The group that would eventually star Beyoncé Knowles, Kelly Rowland and Michelle Williams started off opening up for groups like SWV, Dru Hill and Immature.
Taylor Swift
The "Mean" singer may seem like she came from humble beginnings, but she's been the opening act for Tim McGraw and Faith Hill on their Soul2Soul 2007 tour, and other country legends like George Strait, Brad Paisley and Rascal Flatts.
Florence and the Machine
This UK indie pop band got their start across the band, opening for MGMT on their European tour in 2008.
Alanis Morisette
The Canadian singer-songwriter may have snagged seven Grammy Awards, but she started off as the opening act for someone you might not expect, Vanilla Ice.
Katy Perry
Before Russell Brand and her "California Girl" dreams, Katy perry was the opening act for No Doubt's Summer 2009 tour.
Sean "Diddy" Combs
Believe it or not, this hip-hop mogul was the opening act for boy band 'N Sync on their Spring 2002 Celebrity Tour.
Britney Spears
Looks like Britney Spears and Sean "Diddy" Combs have something in common: they both served as the opening act for N'Sync.
Rihanna
While recording her debut album, A Girl Like Me, Rihanna served as the opener for Gwen Stefani's tour.
Faith Hill
This Grammy Award-winning country gal opened for the likes of Reba McEntire, Alan Jackson and Brooks & Dunn before hitting it big time.