Stars - they're just like us!

Rihanna helped Jay Z launch his new Tidal music streaming service with a slew of other celebs last night, and she seemed less than enthusiastic when we caught her heading to a dentist appointment in NYC today. Can you blame her? The last thing we'd want to do after partying all night is get a root canal! The singer dressed down for her visit in a grey sweatsuit and rabbit fur-lined Celine slipper sandals, and we guess if you have to have your toofies worked on, you might as well be comfortable while doing it.

It's been a big week for our favorite bad gal! Not only did she debut her new single "B*tch Better Have My Money" at the iHeartRadio awards on Sunday to rave reviews, but her new animated movie Home took the top spot at the box office this past weekend, grossing a whopping $54 million!

Everything she touches turns to gold!