Gwen Stefani attends the NBC’s ‘The Voice’ Season 7 Red Carpet Event at HYDE Sunset: Kitchen + Cocktails in Los Angeles, California on Monday December 8, 2014.

Mackenzie Ziegler wears pink nails with a contrasting sparkling gold nail on each hands.

Maddie Ziegler wears short nude nails at the Press Room of People’s Choice Awards 2016 at the Microsoft Theatre in Los Angeles, California on Wednesday January 06, 2016.

Maddie Ziegler has short sparkling nails to match her outfit at the Nickelodeon’s 28th Annual Kids’ Choice Awards held at the Forum in Los Angeles on Saturday March 28, 2015.

Mackenzie Ziegler wearing pink nails with studs decoration and a sparkling silver nail on eack hand for contrast.

Skai Jackson had silver short nails at the “Zootopia” Los Angeles Premiere at El Capitan Theatre in Hollywood, CA on February 17, 2016

Mackenzie Ziegler wore short sparkling pink nails.

Skai Jackson at the “Star Wars: The Force Awakens” World Premiere at Dolby Theatre, TCL Chinese Theatre and El Capitan Theatre on December 14, 2015.

Khloe Kardashian had long nails painted in black polish.

Jordyn Jones wore long almond nails painted in white lacquer.