"Royals" singer Lorde just had her 'best birthday party' ever after Taylor Swift threw a birthday party dinner for her 20th birthay at ZZ's Clam Bar in New York City. 

Lorde is so done being a teenager for she just recently celebrated her 20th birthday. And the one who just threw her the best birthday she has ever had in her life is no other than Taylor Swift.

"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." The  "Royals" singer expressed how she had fun at the birthday party Taylor Swift planned for her in New York. 

According to Entertainment Weekly, spotted at the dinner party were celebrities Rachel Antonoff , Tavi Gevinson, Karlie Kloss and Mae Whitman. And to complete the "Royals" singer's birthday party, her native New Zealand friends were also there to celebrate with her including Katie Braatvedt, Maddy Budd, Eleanor Day and Jerry Florence. Aziz Ansari was also seen at the party wearing a cat-print-tee matching Taylor Swift's outfit.

Before the party, Taylor Swift posted a photo of her hand-painted birthday card for Lorde in Instagram with her message, "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." Taylor also calls Lorde by her real name. "I. Love. You. So. Much. Ella," Taylor added, as reported by the Huffington Post.

The venue was decorated by Taylor with gold balloons that spelled out "UR 20." And before the birthday party ended, Swift also surprised Lorde with a chocolate birthday cake. Earlier that day, Lorde have posted a lengthy message on Facebook referring herself as a "newborn adult."

"All my life I've been obsessed with adolescence, drunk on it. Even when I was little, I knew that teenagers sparkled. I knew they knew something children didn't know, and adults ended up forgetting. Since 13 I've spent my life building this giant teenage museum, mausoleum maybe, dutifully wolfishly writing every moment down, and repeating it all back like folklore. And now there isn't any more of it."