Is Madonna reuniting with Nicki Minaj on new album?

Madonna has sparked speculation that she is working with Nicki Minaj on material for her upcoming album. She posed for a selfie with the Anaconda rapper on Monday (September 22) after the pair met up in New York City. Screen Shot 2014-09-23 at 09.43.28 Minaj captioned her photo: "My trip to New York isn't the same unless I bump into the Queen. #BitchItsMadonna" However, it was a post from Madge herself that suggested that their reunion may have been for professional reasons. She captioned her photo: "Goin to werk #bitchimmadonna". Earlier this year, Diplo confirmed that the star has recorded a song titled Bitch, I'm Madonna - read more here. Madonna previously collaborated with Minaj on her 2012 single Give Me All Your Luvin' and MDNA album track I Don't Give A. Earlier this month, it was revealed that Alicia Keys is involved in Madonna's current project, which is expected to be released in 2015 - read more here.