There are multiple artists with this name 1) HER, a country-rock band from New York (now Her & Kings County)
2) Her, a band from Poland.
3) HER, a temporary name for the Finnish band HIM during their tour of the U.S. while releasing "Razorblade Romance".
4) HER, an all-girl rock band from London, Ontario, Canada, featuring Rose Cora Perry (Anti-Hero/The Reckoning) & Trish Doan (Kittie).

Read more about Her on Last.fm.