SURPRISE! Guess who performance was wack? Rihanna lol! Rihanna hit the stage with much confidence and a new hairstyle but didn't deliver the goods. Sources say the show would have been better if she never showed up.

(Yahoo Music)Although the 46th annual Academy of Country Music Awards Sunday evening boasted an unusually rich list of interesting moments/personalities/collaborations, there were two performances that took up the majority of preshow chatter. One of these was non-country superstar Rihanna dueting with Sugarland frontwoman Jennifer Nettles. The other, Carrie Underwood with a tantalizingly unnamed "surprise" partner on stage.

Needless to say, only one performance lived up to the considerable hype.

I won't keep you in suspense. It wasn't Rihanna's. Unfortunately, the pop diva's duet with Nettles--a rendition of Rihanna's ballad "California King Bed"--felt leaden at worst, overwrought at best, leading mostly to a sense of wondering who on earth thought this would be a good idea.