Cimorelli, who will release their 'Made in America' EP on June 18, offered their sister take (literally), on Justin Timberlake's hit single 'Mirrors.' They also got an assist from a boy bander -- Big Time Rush's James Maslow -- who upped the ante.

With Maslow installed among the Cimorelli ranks, this version of JT's contemplative track gets a boost from an added masculine element. Maslow's presence adds a whole other layer of harmony, too. Overall, Cimorelli x Maslow works since they take a catchy song and make it even catchier.

We bet even JT himself would dig this cover.