VIDEO : Rihanna gives fans peek of her sexy alien character, in film 'Valerian'

"Valerian and the City of a Thousand Planets," starring Rihanna, Ethan Hawke, Clive Owen and Cara Delevingne hits theaters on July 21. On Sunday, Rihanna, gave hungry fans a sneak peek of her character ? a shape-shifting alien named Bubble. The singer/actress brought the extraterrestrial burlesque dancer, who transforms into a blue blob, to life. She told ET that she?s excited to be part of the long-awaited space opera, directed by Luc Besson.