Written by OK Staff, March 21, 2016

Actress Reese Witherspoon celebrated her upcoming 40th birthday on Saturday night with a slew of famous pals, including Taylor Swift, Robert Downey Jr, Jennfier Aniston and Matthew McConaughey.

Guests each took turns taking to the stage and singing for the star, until Reese herself decided to hop up, with the star of 2002’s Sweet Home Alabama serenading her guests with the hit tune while Keith Urban accompanied her on guitar.

Have a look at the star rocking out below!


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