It's Labor Day, and Prince knows the importance of letting loose. That's why the rock legend's new single, "U Know," taken from his upcoming album Art Official Age (September 30) is a pefectly playful robotic trip through his Purple world with a little help from 3RDEYEGIRL. It's smooth and sexy in all the right places, with the musician's vocals transformed into a steady digi-drawl for the verses, before picking up steam and soul for those billowing choruses. It's the kind of futuristic R&B that Prince prodigy Janelle Monáe has been letting loose for the past few years. Stream the song and check out the Art Official Age cover artwork below.