There are (at least) three artists who have recorded under the name Andrea. 1) Andrea is a Bulgarian singer.
Teodora Rumenova Andreeva (born January 23, 1987), best known by her stage name Andrea (Cyrillic: Андреа), is a Bulgarian pop-folk singer. She and the Romanian singer Costi Ionita performed together and released music as Sahara.
Her musical career began with the help of her producer Lyusi Ilarionov.

Read more about Andrea on Last.fm.