TERI HATCHER takes off her "Desperate Housewives" baby bump to rehearse with the BAND FROM TV for her upcoming appearances on "Idol Gives Back" and this weekend's "Comedy for a Cure" -- and ET was there.

The Band from TV includes such famous faces as HUGH LAURIE, JAMES DENTON, GREG GRUNBERG, BONNIE SOMERVILLE and BOB GUINEY.

Each of the celebrities participates to raise monies for their favorite charities: Hugh for Save the Children, James for the Conservation Fund, Greg for the Epilepsy Foundation, and Bob and Bonnie for Art of Elysium.

"Comedy for a Cure" takes place Sunday, April 6 at the Avalon Hollywood in Hollywood, Calif., beginning at 5 p.m. Teri Hatcher will be honored for her ongoing work on behalf of the Tuberous Sclerosis Alliance.

"Idol Gives Back" airs Wednesday, April 9 at 7:30 p.m. on FOX.