There're, at least, seven artists using the name:

1) A Finnish alternative metal band. Founded in 1997, the band has published 12 releases including 4 albums and 3 dvd's. The band has developed into a fierce metal machine and has enjoyed great success after the release of «Suljetut Ajatukset» (2004), «Sivu syyttömistä» (2007) and «Tuomittujen joukkoon» (2009) -albums. (Madonna’s Latin label Maverick Música, received a Grammy nomination for best Latin Female Vocalist. Actually, APT (apartment), produced by Jimmy Frazier and Nicole have been listened successfully in the Chilean radios and MTV.
(Nicole J. McCloud, an R&B, soul and house singer who recorded simply as Nicole in the 1980's but now uses her full name. As Nicole, she had a massive hit with Don't You Want My Love in 1985.