Words: Steve Brown
Lady Gaga fans were in for a treat when she unexpectedly brought on her A Star is Born co-star and director Bradley Cooper on stage during her Las Vegas residency.
The two actors are (still) receiving praise for their remake of the hit musical movie - which has previously starred Judy Garland and Barbra Streisand - and the film has been nominated for numerous film awards.
Most notably, the film has been critically acclaimed for the original music with the hit song 'Shallow' still being played over the radio and won Best Original Song at the Golden Globes and is likely to nab the Academy Award as well.
Now, during her Las Vegas residency over the weekend, Lady Gaga surprised fans by inviting her co-star and close friend Cooper onto the stage and fans went wild as they performed their hit song - which was co-written by Mark Ronson.
Watch the performance below and we dare you not to sing along: