"What is Love," in keeping with the tropical theme of the "Rio" films, is a slice of sun-drenched soul chock full of island vibes.
Monae isn't just guesting on the soundtrack. She'll also be voicing a character in "Rio 2": a veterinarian.
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Alongside Monae, Mars will appear on the soundtrack with "Welcome Back." Mars also uses his voice for more than just singing, voicing Roberto, a childhood friend of main character Jewel (Anne Hathaway), in the film.
"Rio 2: Music from the Motion Picture" will also feature contributions from B.o.B. and Philip Lawrence, as well as multiple Brazilian acts: 15-member percussion group Barbatuques, Carlinhos Brown and Milton Nascimento.
The "Rio 2" soundtrack will hit stores March 25, a few weeks in advance of the film's April 11 release. Pre-orders for the album begin today on iTunes.