Even though Paul McCartney has been making music for nearly 70 years and has a legendary catalog to pull from, Will Ferrell and Marcello Hernandez make an unusual prediction for what the Beatles singer/songwriter might perform when he appears as the musical guest on Saturday Night Live this weekend.

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In new promos, this weekend’s host, SNL alum Ferrell, and current cast member Hernandez appear alongside McCartney, who’s promoting his upcoming 21st solo studio album The Boys of Dungeon Lane, which arrives on May 29. But it’s not a song from his new album that Ferrell and Hernandez are expecting.

“Sir Paul, everyone’s wondering what songs you’re going to play on Saturday,” Hernandez says in the promos, but McCartney responds: “I won’t tell.”

Ferrell has an idea: “What if we guess? If me and Marcello say it at the say time, will you tell us if that’s what you’ll be singing?,” to which McCartney relents, “Sure, why not?”

On the count of three, Ferrell and Hernandez make their prediction in unison: “‘Despacito‘ remix featuring Justin Bieber!”

“Damn, how’d you know?” McCartney says in shock when they guess the Luis Fonsi and Daddy Yankee hit, which topped the Billboard Hot 100 for a then-record-tying 16 weeks back in 2017.

Watch the promos below:

Saturday will mark McCartney’s fifth time as a musical guest on the show, and it will be almost 46 years to the day since his performance debut on the show, on May 17, 1980. McCartney also performed on both the 40th and 50th anniversary Saturday Night Live specials.

Ferrell spent seven seasons on SNL as a cast member, from 1995 to 2002. This will mark his sixth time returning as the host.

Saturday Night Live airs at 11:30 p.m. ET/8:30 p.m. PT on NBC and streams on Peacock. (See all the options to watch SNL here.)