The 'Work' singer rang in her 28th birthday on Saturday.
The singers get flirty in the 27-year-old's sexy new video for "Work."
The singer's rep told ET that production delays were to blame for the rescheduling.
ET investigates what went down moments before the pop star canceled her performance during music's biggest night.
ET is looking into what led up to Rihanna being a no-show on music's biggest night.
'The Late Late Show' host was to take part in the pop star's performance.
There were a notable number of celebrities missing from the star-studded event on Monday.
The expecting couple opened up to ET at the GRAMMYs about their little girl to come.
Rihanna's rep confirms to ET she was sick.
Rihanna pulled out of the show due to vocal issues.
The rapper expresses his frustrations in a heated Twitter rant.
The 'Work' singer showed off her chic sportswear collection with help from the 20-year-old model.
Khloe Kardashian, Kate Hudson, Leonardo DiCaprio and more prove single is sexy.
Who needs a Valentine when you have it all going on yourself?
