Watch 'Glee's' Mercedes (Amber Riley) cover Houston's biggest hit.
Just a few days after Jennifer Hudson's beautiful rendition of Whitney Houston's "I Will Always Love You" at the Grammys, "Glee's" Amber Riley (playing the character, Mercedes) also has a go at covering one of late singer's biggest hits.
Watch as Mercedes breaks into song after ending her affair with ex-boyfriend Sam and her relationship with current boyfriend, Shane. "When it comes to love I don't know who I am," she tells Sam. "Until I find out I can't be with anyone."
The Valentine's Day episode was dedicated to Whitney Houston. "Whitney Houston 1963-2012. We will always love you," read a message at the end of the show.