The birthday girl partied the night away with help from beau Robert Pattinson and a few famous friends...
The private party took place on Saturday, at Rockwell’s Bar & Grill in Squamish, Vancouver, close to the Breaking Dawn set.
And it seems thebirthday girl was intent on having a good time.
‘Everyone was in a good mood, but it was a bittersweet night (as filming is almost complete),’ one onlooker told American magazine Us.
‘Rob and Kristen were together all night,’ the insider added. ‘They held hands and he kissed her cheek a bunch of times.’
‘Rob led the crowd singing for her, and you could tell she was so embarrassed but in a cute way!’ the source revealed.
And after the cake? No 21st birthday would be complete without a show-stopping present.
‘Rob was so excited for Kristenand they each took turns riding it,’ said the source.
‘Kristen learned to ride a dirt bike in New Moon so they thought it would be appropriate. Rob was supervising as she sat on it to make sure she was ok.
‘They looked like they were having a great time, and it will be something they can really enjoy!’
How we would have loved to be a fly on the wall at that party.
Happy birthday Kristen!
What are your thoughts on Kristen’s private birthday party? Let us know in the comments box below.