Popsugar Celebrity Julia Michaels Selena Gomez at Julia Michaels's '90s-Themed Birthday Party Selena Gomez Goes '90s Glam For Julia Michaels's Prom-Themed Birthday Bash 11 November 2019 by Monica Sisavat Solís Image Source: Instagram user raquellestevens Selena Gomez took it back to the '90s in honour of pal Julia Michaels's 26th birthday. On Sunday, the 27-year-old singer attended Julia's prom-themed party, and it looked straight out of a movie. Selena wore a black slip dress with a matching choker and boots, while Julia rocked a red babydoll dress and gloves. Julia's actual birthday is on Nov. 13, and from the looks of it, the party was a hit. Selena and Julia have been friends for quite a few years now. In fact, Julia has written a lot of Selena's famous hits, including "Bad Liar" and "Slow Down." In a heartfelt Instagram post back in January, Selena opened up about her friendship with the songwriter, calling Julia her "sweet soul sister." "Julia you have been a huge part of my life," she wrote. "You have taught me how to have courage when I have self doubt." See photos from Julia's birthday extravaganza ahead! Related: Look at Her Now: Selena Gomez Has Been on a Sexy Streak This Year Image Source: Instagram user selenagomez 1 / 6 Image Source: Instagram user brookereese 2 / 6 Image Source: Instagram user brookereese 3 / 6 Image Source: Instagram user peachtreeee 4 / 6 Image Source: Instagram user thacrownjules 5 / 6 Image Source: Instagram user raquellestevens 6 / 6 Julia MichaelsCelebrity FriendshipsCelebrity InstagramsCelebrity BirthdaysSelena Gomez