Lorde Rings in Her 20th Birthday Partying with Taylor Swift and the Squad

On Monday night, Lorde said goodbye to her teen years and rang in her 20s with her team of BFFs, including Karlie Kloss, Lena Dunham, and Aziz Ansari at an intimate New York City bash hosted by girl squad ringleader Taylor Swift.

The "Royals" hitmaker took to Instagram to share a series of snapshots from the fun-filled evening, including clips of her cake and plenty of red and gold balloons, as well as the sweetest photo of her getting kisses from the "Bad Blood" singer and Kloss.

The birthday girl captioned the photo, "Had the best birthday party i've ever had tonight surrounded by my nyc family. all organised by tay who is as she says 'a mom with no kids'. i am ur kid and u love me so hard i could burst. here's to our 3 magic years of best friendship and more moments like this squished between angels."

Swift also returned the love via Instagram, posting several photos including one of a hand-painted card with the words "20" and "Ella." The pop singer captioned the card, "Thank you for the music you make, the advice you give, the thoughts you provoke, and the way you've made my life more beautiful since the first day we met up in New York and ate burgers on a park bench and got attacked by squirrels.I. Love. You. So. Much. Ella.@lordemusic."

VIDEO: Taylor Swift & Karlie Kloss Are #BFFGoals

Check out more photos from Lorde's birthday party below!