Keri Hilson on being blown away by Justin Bieber
The Grammy hopeful -- nominated for two awards for Best New Artist and Best Rap/Sung Collaboration for ``Knock You Down'' featuring Kanye West and Ne-Yo -- opens up about the when she realized her calling, being blown away by a Justin Bieber concert, and the last time she was embarrassed on stage.
Singer Justin Bieber has been praised by CSI bosses for his appearance on the show.