Not suprised she felt the need to give us an excuse/warning before her very brief attempt to sing acapella. This girl is a joke. Guess you don't have to lip synch when everyone expects you to sound horrible and doesn't seem to care for the moment. However, I think her fifteen minutes of fame are TICK-TOCKing away. Of course she likes Rihanna, the lower the vocal bar is set, the better chance she'll have at reaching it. Rihanna keeps pushing the bar down for so-called singers like Ke$ha, meanwhile real singers like Beyonce and Christina will set the bar far beyond her reach.