Demi Lovato’s black pointy nails at an in-store appearance signing copies of her cover issue of Seventeen Magazine at Barnnes & Noble in Glendale, CA on January 4, 2012.

Demi Lovato’s silver nails at the 2011 MTV Video Music Awards at the LA Live on August 28, 2011 in Los Angeles, CA.

Demi Lovato’s semi-transparent acrylic nails at the nominations announcement for the 2010 American Music Awards at the JW Marriott at L.A. Live on October 12, 2010 in Los Angeles, CA.

Demi Lovato’s black nail polish at the 2008 MTV Video Music Awards at Paramount Pictures Studios in Los Angeles, CA on September 7, 2008.

Lexus Amanda’s black acrylic nails with white tiger stripes

Lexus Amanda’s French manicure with black tips

Lexus Amanda’s square French manicure.

Juliet Simms got a whacky Batman-themed manicure with a yellow and black Bat-Signal on her thumbnail and her other nails shaped like Batman’s mask.

Juliet Simms’ pointy nails have a two-tone look with tan and black glitter. On finger on each hand is silver.

Juliet Simms holds up her hands to show off her short black nails — and piles of jewelry!