The celebrity friends came together on Tuesday (3 March) to celebrate Fifth Harmony singer Camila Cabello's milestone 18th birthday in style!
Selena shared this image to Instagram giving fans a glimpse at the rather A-List guest list of pals who turned up to help Camila blow out the candles on her birthday cake.
We wonder if baking fan Taylor Swift made it?!
In these pictures shared online, we can spy Selena, Taylor, Hailee, Jaime, Camila (obvs!), Modern Family's Sarah Hyland, Haim and Paramore's Hayley Williams.
That is one star-studded bash!
Taylor made it back to the US in time for the celebrations after jetting into the UK last week to perform at the BRIT Awards.
After opening the show with a fab rendition of 'Blank Space', she went on to scoop the prize for 'Best International Female' and used her acceptance speech to thank her famous UK friends Ellie Goulding, Cara Delevingne, Sam Smith and Ed Sheeran.
Later in the show, supermodel Karlie Kloss - a presenter - publicly sent her congratulations to "best friend" Taylor on her award.
Could Taylor have any more star friends?!
Check out all Taylor's celeb besties below!
Copyright: WENN David Lucas