"Sleepover Suite" is the seventy-second episode of The Suite Life of Zack & Cody.
To impress Stacey (Meaghan Jette Martin), Cody tells her that she can have her birthday slumber party in London's hotel suite while she is in Scotland but, when London comes home early, Zack, Cody, and Nia must find a way to keep London out of the suite. Meanwhile, Carey is constantly pursued by a barbershop quartet named The Mellow Notes because she is so beautiful. In the end, Cody, Zack, and Nia confess everything, making Stacey lose interest in Cody and the three grounded. Also, the barbershop quartet has Moseby join the band and they sing to Carey.
- Giovonnie Samuels as Nia, Meaghan Jette Martin as Stacey, Raini Rodriguez as Betsy
- Ashley Tisdale as Maddie Fitzpatrick