Alicia Keys, H.E.R, Ludacris and more rock the stage

Think about the fact that Usher was the special guest of the Black Eyed Peas — the freaking Black Eyed Peas — when the “I Gotta Feeling” foursome headlined the Super Bowl XLV halftime show in 2011.

How will.i.am, Fergie and crew could ever relegate Usher to a backup role on the biggest stage in music is enough to make anybody go, “OMG”?

But 13 years after Usher swooped in and upstaged the Peas — he was by far the best thing about one of the most lackluster Super Bowl halftime shows since figure skaters Dorothy Hamill and Brian Boitano had top billing in 2010’s “Winter Magic”-themed spectacle — justice was finally served when Usher had his own career moment on Sunday.

This time around — midway through the showdown between the Kansas City Chiefs and the San Francisco 49ers — at Allegiant Stadium in Las Vegas — it was will.i.am. who made the quick cameo during “OMG” as Usher Raymond IV reminded us about the superstar that he is 30 years after he made his self-titled debut at 15

Now 45 — and in the midst of a killer comeback that was jump-started by his sold-out “My Way” residency that made him the biggest stud in Sin City — Usher is still Usher, baby.

And hot on the heels of his smoking new album “Coming Home,” which was released on Friday, Daddy sealed his return to the top of pop with a performance full of fancy footwork and soulful vocals as he smoothly grooved through hit after hit.

Making his Vegas-y entrance to “Caught Up,” he veered into “U Don’t Have to Call” and a marching-band take on “Love in This Club” before he welcomed the first of his guests: Alicia Keys, who took the piano for a bit of her own “If I Ain’t Got You” before they duetted on “My Boo.”

Then, after an appearance from early producer Jermaine Dupri, he hit his slow-jam stride with “Confessions Part II” and “U Got It Bad” before another guest, “Coming Home” collaborator H.E.R., rocked out on a guitar with a little bit of “Bad Girl.”

But as expected, Lil Jon and Ludacris were the biggest guests of the night when they joined to turn Allegiant Stadium all the way up with the “Yeah!” finale.

It was all a reminder of the vital force that Usher as a performer. And “Coming Home” — his first solo LP in eight years — proves that he is still very much a relevant recording artist, taking R&B fans back to a place that feels just like home.

Usher waited until he was good and ready before “Coming Home.”

“Though I had gone through a lot of experiences that I felt were interesting and gave me some really cool topics and things to talk about and share, I just didn’t feel like I was ready to share a full body of work yet,” he told The Post. “There were some things that needed to be worked out, and I feel like now is the time.”

Certainly, it was Usher’s time on Sunday night.

“This is a legacy moment — and a legacy moment that has given me the opportunity to celebrate in a place that I call a home away from home: Las Vegas,” he said. “It’s just like home to me now.”