"We obviously idolize Britney Spears, and being able to know her and talk to us and have her support..." means a lot to them, says Simone Battle.
"You wouldn't even think when you're listening to her album when you're a little kid you wouldn't think 'I'm going to collaborate with her some day and feature," Lauren Bennett added. "You don't think that that's real."
Watch it here (Brit part starts at 0:55):
Buy their EP on iTunes today!