The stakes are high and the competition fierce with all-new, all-star episodes of "Don't Forget The Lyrics!" airing Thursdays (9:00-10:00 PM ET/PT) on FOX. Recording artists Boyz II Men, Bret Michaels, Kevin Cronin and Kimberley Locke compete for charity, and Gloria Gaynor and Kenny Loggins make surprise guest appearances on the show.

The star-studded episodes kick-off Thursday, Feb. 21 (9:00-10:00 PM ET/PT), when host Wayne Brady welcomes the most successful male R&B group of all time, Boyz II Men, who will compete for the Lili Claire Foundation and the TJ Martell Foundation. Boyz II Men close the show with a medley of Motown hits "Same Old Song," "Reach Out" and "End of the Road" from their latest CD, "Motown: A Journey Through Hitsville USA."

All-star episodes continue on Thursdays (9:00-10:00 PM ET/PT) (dates to be announced). These episodes will be headlined by Bret Michaels competing for Juvenile Diabetes Research Foundation and St. Jude Children's Research Hospital, Kevin Cronin playing for the MusiCares charity, and former American Idol contestant Kimberley Locke singing her heart out for Camp Heartland, a charity that benefits children and their families facing HIV/AIDS.

Additional celebrities appearing this spring include Gloria Gaynor performing her inspirational anthem "I Will Survive" and Kenny Loggins surprising a contestant on the show who is his biggest fan with a performance of "I'm Alright" and then teaming up for a duet of "Footloose."