Seventeen years after Victorious costars Ariana Grande and Liz Gillies made their Broadway debuts together in NYC, the Wicked star celebrated her longtime friend’s new role in Little Shop of Horrors.

For more than a decade, Ariana Grande and Elizabeth "Liz" Gillies' friendship has remained ... the duo—who first met when ...

Ariana Grande proudly supported and cheered on Elizabeth Gillies ahead of her big stage ... marks her first since the duo starred together in 13: The Musical on Broadway in 2008.