Credit: Instagram

In case starring on Glee and winning Dancing With the Stars weren’t enough to convince you of exactly how cool Amber Riley (Mercedes) is, let us give you another reason to love her: she threw a concert at the Roxy in LA last night for her fans — with crazy cheap tickets! — that was completely sold out.

When Amber first announced the concert earlier this month, she promised a special guest, and we were sure it would be one of the Glee cast members. Instead, it was someone even more important to Amber: her mom!

Mama Riley took the stage with Amber to perform together, and Amber couldn’t have been more thrilled to have her there. “My very special guest @mzpeechezz!” Amber tweeted Monday night after the show. “My beautiful amazing mom. Thank you for gracing us with your beautiful voice.”

And although Amber’s special guest wasn’t one of her Glee castmates, one of them was still in the audience showing her support: Dianna Agron (Quinn)!

Your voice has no limits. You owned that stage tonight,” Dianna tweeted. “I love you so much. That. Was. Special.”

I love you too!” Amber replied. “Thank you so much for coming.”

Aww, so sweet! We want to be BFF with these two so much.

And since the reason Amber performed was to thank her fans for helping her win DWTS, she made sure to throw a tweet out there about how much she appreciates them, too. “Tonight was absolutely amazing!” she said. “Thank you guys for coming, I can't believe it was sold out! You made a dream a reality :) THANK YOU!!!!”

We’re super happy for Amber — she totally deserves her success!

Couldn’t make it to the concert? Watch the video of Amber singing “All I Want For Christmas Is You” below, and then head to the comments to gush with us over how perfect she is.

Source: YouTube, Twitter