Jelly Roll’s very busy weekend in New York City kicked off Friday night with a concert at Madison Square Garden, where the singer was joined onstage by surprise guest Post Malone.

The two artists performed three tracks together: A rendition of the country classic “Friends in Low Places,” a version of Malone’s “I Had Some Help” with Jelly Roll filling in for Morgan Wallen, and the live debut of “Losers,” their collaboration from Malone’s F-1 Trillion.

Malone wasn’t the only special guest at Jelly Roll’s MSG gig: Alexandra Kay stopped by for covers of Toby Keith’s “Should’ve Been a Cowboy” and Shania Twain’s “Man! I Feel Like a Woman!,” Jessie Murph performed her own “Wild Ones” and, more surprisingly, even Busta Rhymes dropped in.

Jelly Roll’s non-stop tour of NYC continues Saturday with a performance at the Global Citizen Festival in Central Park (Malone is also on the lineup), after which he’ll on down to Rockefeller Center to serve as musical guest on the Season 50 premiere of Saturday Night Live, hosted by Jean Smart.

After that, the singer will journey to New Jersey on Sunday for a gig at Newark’s Prudential Center, after which his Beautifully Broken Tour will depart the tri-state area and head to Pennsylvania.