Cardi b pulls out of tour with bruno mars

I'm not aware of any information about Cardi B pulling out of a tour with Bruno Mars. It's possible that you may be thinking of a different artist or a different tour.

However, it's worth noting that Cardi B and Bruno Mars have collaborated on music in the past. They released a single together called "Please Me" in 2019, which was a commercial success. But I'm not aware of any plans for them to tour together.

If you could provide more context or clarify what you're referring to, I'd be happy to try and help you further.