Austin's birthday is coming up, and it is only 3 days apart from Trish's birthday. Ally and Dez work together to plan a joint surprise birthday party for them both. Dez convinces Jimmy Starr to get Rihanna to perform at the party, and he writes her number on a piece of paper. But Ally and Dez lose the paper in the big birthday cake, which is ten tiers big! Will they manage to find it - even if it means ruining the very expensive, delicious cake??!
Eventually Rihanna comes. She performs.
SPECIAL GUEST STAR:: RIHANNA AS HERSELF
- 'Diamonds' by Rihanna
- 'We Found Love' by Rihanna