John Legend's 'This Is Us' cameo has fans freaking out

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WARNING: This post contains spoilers from the midseason premiere of 'This Is Us.'

It's a great week because This Is Us has returned.

Not only were viewers looking forward to the midseason premiere because it brought the Pearson family back into our homes, but fans were also excited for a legendary cameo by John Legend.

When the singer's guest appearance was first teased in a preview for the episode, which aired during the Golden Globes, fans took notice and had a lot of questions. They, of course, went straight to the source — Legend's wife, Chrissy Teigen.

However, apparently even Teigen was surprised by her hubby's cameo, as she tweeted:

On Tuesday's episode, we picked up where we left off with Kevin Pearson (Justin Hartley) looking for his future wife, whom he thought he found in Lizzie, played by guest actress Sophia Bush. After revealing to Kevin that her favorite musician is "John Legend all the way," Kevin did the ultimate and put together a private concert for Lizzie at the iconic Hollywood Bowl.

Not only did Legend have a guest appearance on the show, his new single, "Conversations in the Dark," which was released a few days prior to the episode, was also featured.

Below is John Legend's "Conversations in the Dark" lyric video:

This Is Us fans were freaking out over John Legend as Kevin's surprise to his new love interest:

Of course they were even more freaked out over Lizzie's major plot twist — she's married.

Unfortunately for Kevin, Lizzie wasn't his soulmate, because she was already someone else's.

Lizzie revealed to Kevin that he was her celebrity "hall pass," and that her husband had encouraged her to "go for it."

As you could imagine, this revelation had fans very upset with Lizzie:

This Is Us airs Tuesdays at 9 p.m. on NBC.

Watch Sterling K. Brown getting emotional after discovering the truth about his ancestors:

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