[Image Credit: Twitter]

There were rumors that Metallica was going to try to add Lady Gaga as a fifth member of the band after the two performed together at the Grammys, but after seeing this performance, we want Iggy Pop to be the fith member!

Check out video of them playing The Stooges' “TV EYE” below!

Read more: This is what Metallica and Lady Gaga’s Grammys performance should have looked like

Pop had been opening up for the metal legends for the three nights they were in Mexico City but it got even more amazing when Pop joined Metallica up on stage.

“Metallica has much respect for the man coming out here to sing a song with us. And we're grateful that he's been able to be on this Mexico City tour with us,” said Metallica singer/guitarist James Hetfield . “Please show your sign of respect and love for Mr. Iggy Pop.”

If you think it's surreal seeing pictures of the 69-year-old punk legend alongside Metallica, wait till you hear them perform together.

Watch the two legends perform “TV EYE” below!

What'd you think of the two legends colliding? Let us know in the comments!

Metallica will be touring stateside starting in May along with Avenged Sevenfold, Volbeat and Gojira. Check out the complete list of dates below!

Tour dates:

05/10 – Baltimore, Md. – M&T Bank Stadium*^
05/12 – Philadelphia, Pa. – Lincoln Financial Field*^
05/14 – East Rutherford, N.J. – MetLife Stadium*^
05/17 – Uniondale, N.Y. – New Coliseum^
05/19 – Boston, Mass. – Gillette Stadium ^
05/21 – Columbus, Ohio – Rock On The Range Festival (SOLD OUT)
06/04 – St. Louis, Mo. – Busch Stadium^
06/07 – Denver, Colo. – Sports Authority Field*^
06/11 – Houston, Texas – NRG Stadium*^
06/14 – San Antonio, Texas – Alamodome*
06/16 – Dallas, Texas – AT&T Stadium*
06/18 – Chicago, Ill. – Soldier Field*
07/05 – Orlando, Fla. – Camping World Stadium*^
07/07 – Miami, Fla. – Hard Rock Stadium*^
07/09 – Atlanta, Ga. – Suntrust Park*^
07/12 – Detroit, Mich. – Comercia Park*^
07/14 – Quebec City, Quebec- Festival D’Ete
07/16 – Toronto, Ontario – Rogers Centre*^
07/19 – Montreal, Quebec – Parc Jean-Drapeau*^
07/29 – Los Angeles, Calif. – Rose Bowl*+
08/04 – Phoenix, Ariz. – University of Phoenix Stadium*+
08/06 – San Diego, Calif. – Petco Park*+
08/09 – Seattle, Wash. – Centurylink Field*+
08/14 – Vancouver, British Columbia – BC Place*+
08/16 – Edmonton, Alberta – Commonwealth Stadium*+

*With Avenged Sevenfold
^With Volbeat
+With Gojira