Plot: He's battled addiction, tabloids and "Dancing with the Stars" -- and DAVID ARQUETTE has come out on top! He's the executive producer of the hit comedy "Cougar Town" starring Courteney Cox, and it was recently announced he's going to be starring in a new pilot with Ellen's wife, Portia de Rossi! He's here today so Ellen can welcome him to the family! Then, ROBIN THICKE pays tribute to the legendary Whitney Houston with a cover of her classic hit, "Exhale (Shoop Shoop)," that you won't want to miss.