Taylor Swift proved she really is worthy of her Birthday Queen crown on Saturday night (August 6),as she casually performed with Nelly for her BFF Karlie Kloss' birthday party.

Taking place in the ever fancy Hamptons, Tay joined the rapper for a quick rendition of 'Dilemma' and, well, it was basically a 00's dream come true.

With Tay singing Kelly Rowland's parts and even getting on board with a bit of sassy flirting, all that was missing was a Louis Vuitton trilby and a suede crop top.

Thank you Karlie,for being born and having a party to celebrate.

Though let's not forget that this isn't the first time the two have performed together, with Nelly having previously jumped on stage with Taylor for her 1989 tour.

Sothere is a collab album on theway then, yeah?