Olivia Holt's debut atop a major studio call sheet ... cover of The Smashing Pumpkins' "Today" for Cruel Summer. Was that song choice already scripted, or did you get to pick from a few options?

Among the hopefuls is Olivia Holt. Like Britney ... Holt proved she knows her Spears music when she named her favorite songs by the “Slave 4 U” singer. “I could go way back and we can ...