Kerli’s neon orange nails at the 2012 MusiCares Gala honoring Paul McCartney at LA Convention Center on February 10, 2012 in Los Angeles, CA.

Cher Lloyd’s pastel rainbow nails in her “Want U Back” music video

Cassadee Pope sings “Cry” live on The Voice

Cassadee Pope sings “Payphone” on The Voice

Cassadee Pope’s black nails during her blind audition of “Torn” on The Voice

Cassadee Pope’s blue nails during her performance of “Over You” live on The Voice

Cassadee Pope sings “I’m With You” live on The Voice

Selena Gomez at the Vanity Fair Oscar Party at Sunset Tower on February 26, 2012 in West Hollywood, California.

Selena Gomez arrives at the 2011 Teen Choice Awards at the Gibson Amphitheatre, Universal Studios, Hollywood on August 7, 2011 in Los Angeles, CA

Selena Gomez arrives at the 2010 MTV Video Music Awards at Nokia – LA Live on September 12, 2010 in Los Angeles, CA