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Mac Miller is putting his collaboration album with Pharrell Williams on hold.  While the album - titled "Pink Slime" - was the rapper's next move for a while, he's decided to put the project on the back burner. 

Mac Miller says, in a radio interview, that the decision to push back "Pink Slim" came after he realized that he wanted to "solidify" his brand before he mixes it with Pharrell's. 

Instead, Mac will use the time to focus on his second album, Watching Movies With the Sound Off, which is scheduled to hit stores sometime this summer. 

Mac Miller and Pharrell had managed to lay down a few tracks before Mac put the brakes on the project.  Miller explains that he and Pharrell had a "great" vibe together. 

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