If there was a joint tour (ala Bey+Jay Z/ Rihanna+Eminem) with Lady Gaga as one act, who should be the other act?

Is there anyone that would make sense? surprise people?

I think artists are doing more joint tours because they are more profitable, and will also bring music fans together.

Madonna.

Kanye (since it was already planned) or Beyonce cause they have 2 songs together..

I can't think of anyone else.

Madonna or Britney Spears. Beyoncé would make Lady Gaga look inferior, so although I'm here for it, it'd be embarrassing.

30 Seconds to Mars

Cyndi Lauper?

Ke$ha

A doctor.

Katy Perry

Rihanna or Madonna

Gaga and Riff Raff would Slay!!!

Lady Gaga only does LIVE pop shows.

Kanye makes sense since they had already planned a joint tour. Xtina would be a good choice also (they vibed well together during The Voice) as would Miley.

Pretty much this, though Bey would never since she has her husband with her.

I think Natalia Kills and Lady Gaga would be a good joint tour, but idk how they feel about each other / if they would even work together.

I can see a Coldplay + Gaga type thing.

Xtina (I would probably go )

Not surprised to see the usuals running in here w/ stale jokes.

I'd have to say either Kanye or Britney. Though she'd have to change things up and make a darker album to vibe well with Kanye's music.

A Britney co-headline would be an interesting switch up to the usual rapper & pop star formula. It'd be like a pop diva version of the WTT-tour. They'd both have to step up their music game for it to be properly epic tho, like some next level The Fame Monster/Blackout ****.

Gaga and Madonna would be such an event. A very, very gay event.
Gaga and Kanye would work. Spectacular show, no doubt.
Gaga and Queen might be interesting. They'd need a Freddie Vocalist, though.
Gaga and Justin Timberlake, perhaps.
Gaga and Elton, although I see that as more of a mini-tour or residency.