Britney Spears Freak Show- Vegas Star Brings Kathy Griffin Onstage During Performance [Watch]

The Queen of Pop was joined by the Queen of Comedy over the weekend in Las Vegas. Britney Spears invited Kathy Griffin up onstage during her Piece of Me show and it was definitely a sight to be seen. During Saturday's performance, Griffin was called to help Brit sing her song "Freakshow," at the Planet Hollywood Resort & Casino where she is currently enjoying her Vegas residency.

In the video clip, Britney attaches a lease around Griffins neck and parades her around on stage like a little lap dog. The red headed comedienne is definitely a trooper as she has fun making a fool out of herself all in the name of comedy.

At the end of the performance Brit gushes and thanks the celeb for helping her out with the song and she even presents her with a signed t-shirt before giving her a hug and sending her offstage.

Kathy posted a picture to her Twitter account of the aftermath of the performance. In the image, Griffin showed off some major bruises on her knees.

Spent last evening w Miss @BritneySpears here in #Vegas, woke up w rug burns! What happened? pic.twitter.com/yd5CsWmS0Y

— Kathy Griffin (@kathygriffin) November 2, 2014

She captioned the image, "Spent last evening w Miss @BritneySpears here in #Vegas, woke up w rug burns! What happened? She then followed that post up with another one of her standing onstage alongside Spears.

Turns out @BritneySpears wanted a #PieceOfMe. Trust me, there's quite a story behind this picture;) pic.twitter.com/1KoYNcKl20 — Kathy Griffin (@kathygriffin) November 3, 2014

She posted, "Turns out @BritneySpears wanted a #PieceOfMe. Trust me, there's quite a story behind this picture ;)"

The singer has extended her tour into 2017 and it seems like a no-brainer as Daily Mail is posting that Spear's show has brought in $20 million for the hotel casino. The singer also reportedly made a deal with the venue for $12 million for the additional shows.

[Image courtesy of YouTube]