Last nights ACM Awards brought many firsts... Rihanna teamed up to duet with Jennifer Nettles from Sugarland to sing one of Rihanna's songs called California King Bed. This duo did not fair well in the fans eyes, Jennifer is such a strong performer with a great stage presence shadowed over Rihanna... this may not have looked so bad if the couple were singing a Sugarland song. But the huge surprise of the night was Carrie Underwood teaming up with Aerosmith superstar Steven Tyler- they rocked out to 'Un-do it' and 'Walk This Way'. Their performance stole the show. Even though Carrie didn't win any awards this year she will be remembered for this show. Click here to see the videos of Rihanna and Carrie Underwood.