We're getting several hints from Ke$ha that a new music collaboration might happen- and it sounds goooood! The singer has shown many signs on her Instagram that she's doing a song along with Rihanna in the near future! Just yesterday she posted a pic on her Instagram with a waitress holding a napkin with Rihanna's iconic 'R' on it, along with the caption: "What's it all mean???". Yea, we bet it means the next big party hit will be Rihanna ft. KeSha. Don't you think?! (perezhilton)