Backstreet’s back, but so is *NSYNC.

The boy band’s 2000 smash hit “Bye Bye Bye” returned to Billboard’s Hot 100 this week at No. 45.

It’s all thanks to its placement in the box office hit, “Deadpool and Wolverine,” which just marked its third straight week as the top movie in North American theaters with an estimated $54.2 million in ticket sales.

Worldwide, the movie has now surpassed $1 billion at the box office.

According to Billboard, the song has gotten 10 million official streams in the U.S. from Aug. 2-8, which is a jump of 31%.

Outside the U.S., the song got 42.4 million streams (up 50%) and went to No. 8 from No. 16 on the Billboard Global Excl. U.S. chart.

The opening sequence of the film shows Deadpool, played by Ryan Reynolds, dancing to “Bye Bye Bye” while fighting off Time Variance Authority guards.

“He’s doing a lot of the moves that have been established previously by *NSYNC,” Reynolds said in an interview about the dance scene.

Four members of *NSYNC — JC Chasez, Lance Bass, Chris Kirkpatrick and Joey Fatone — attended the film’s premiere and gave a shoutout to fellow member Justin Timberlake, who was performing on his ongoing tour in Europe.

Although it’s been 24 years since *NSYNC released “Bye Bye Bye” and its “No Strings Attached” album, this isn’t the oldest song to return to Billboard’s Hot 100.

Kate Bush’s “Running Up That Hill — A Deal With God” charted in 2022, 37 years after its initial release, a comeback attributed to a memorable scene in “Stranger Things.”

And, in December 2023, Brenda Lee’s “Rockin’ Around the Christmas Tree” topped the Billboard Hot 100, 65 years after its release.

*NSYNC reunited most recently to record “Paradise,” a song featured on Timberlake’s latest album, “Everything I Thought It Was,” which was released in March.

Last fall, the band also released “Better Place” for the “Trolls: Band Together” soundtrack — its first new song in more than 20 years.