Nicki Minaj has decided to not join Rihanna’s “Last Girl on Earth Tour” this summer.

The rapper revealed the news to fans via her Twitter account yesterday (April 7). “Barbz I’m sorry 2 say I will not be going out on RiRi’s tour,” wrote the Young Money signee. “I’ve decided 2 use that time 4 the completion of my album. Hope u understand.”

Minaj’s album, which has yet to be titeld, saw its first single released in “Massive Attack,” the video for which was premiered last week.

“Barbz, Thx 4 understanding,” added Nicki hours later. “And Thanks to Rihanna 4 being a sweetheart and extending this great opportunity 2 me. Support the show!”