Lil Nas X‘s 2019 continues to be one for the memory books.

After fending off none other than Taylor Swift to keep the No. 1 position on Billboard with his debut single, “Old Town Road,” for the fifth consecutive week in a row on the Hot 100 chart (including the remix with country legend Billy Ray Cyrus), the 20-year-old rapper was able to celebrate his latest musical victories on stage with Cardi B.

On Wednesday night (May 8), the Bronx rapper hosted a launch party for the second season of her partnership with Fashion Nova in Hollywood. Much to the surprise of those in attendance for the exclusive event, Cardi brought out Lil Nas X for a special rendition of his chart-topping song.

Prior to bringing out the fast-rising rapper on stage, Cardi acknowledged how difficult it is to achieve a No. 1 single on the Billboard charts, offering her official co-sign to Lil Nas X.

“It’s hard to get a Number 1 on Billboard,” she shared with the crowd. “So every single time I see someone get that spot I be like damn I’m proud of you.”

Cardi B gave Lil Nas X the spotlight, dancing alongside the cowboy hat-donning artist as he ran through a performance of his No. 1 single. Elsewhere during her celebratory set, the beloved rapper brought out YG and Blueface as special guests in addition to the viral star.

Earlier in the week, Lil Nas X performed the single alongside John Mayer, adding to the outpouring of celebrity attention he has been receiving as of late.

Take a look at some highlights of Lil Nas X at Cardi B’s Fashion Nova party in the clips below.