Give this paragraph about the Alley Cats a capella group, what famous talk show hosts have they performed for?

The group originated in 1987, when a concert choir program was having a variety night occurring at Fullerton College. When John Tebay, the choir director, suggested that Andre Peek (1st tenor and lead vocalist at that time) and Armando Fonseca (2nd tenor) perform together, both of them decided to take Mr. Tebays advice and form a quartet, an a cappella group. Two additional members along the way, Royce Reynolds (bass) and Todd Dixon (baritone)got together and the foursome gained notice. Since then The Alley Cats have performed for many audiences, ranging from elementary school fun nights[1] to being Grand.prize.winners on the Gong Show. Performing on the Arsenio Hall show to The Tonight Show with Jay Leno, as well as opening for Leno at his Las Vegas shows.[2] The Alley Cats's sound has been heard as well at The White House. The Alley Cats appeared in the Richard Simmons workout video Dance Your Pants Off! performed the song Celebration.

Jay Leno and Arsenio Hall