There are multiple artists using the name 'Santa' on last.fm:
1) A Spanish heavy metal band fronted by a female singer Azuzena. The band born by the hands of two Obús members, Fernando Sánchez and Juan Luis Serrano, when they saw an Huracán gig where Azuzena was singing in 1983. The first line-up only recorded a demo in 1983 under the name Viuda Negra. Shortly after they changed their name to Santa. Their most succesful release was Reencarnación that sold 17,000 copies in the first pressing.

Read more about Santa on Last.fm.