And how did she honor her special day? A source exclusively told E! News that the event was a "formal party" with about 50 guests held at a private home.

"Everyone was well dressed and groomed," the source noted. "There were red roses at the entrance and throughout the party."

And the special touches didn't stop there. The source shared that Selena's party featured glasses that said "Selena 30 years," a 

photo booth from The Collective You, and a cake that paid tribute to Selena's work on the Barney & Friends series.

"Everyone sang Happy Birthday to her," the source said. "She was very happy partying with her friends all night and having the best night."

And Selena chose the perfect look for the special occasion. In a photo shared on her Instagram account

after the party, Selena rocked a pink Versace dress paired with hoop earrings. But this was not the only look of the evening. 

Selena's friend Courtney Lopez also shared some photos on Instagram where the 

birthday girl wore a feathered sequined dress. After all, who says you can't wear two dresses to your own party?