●Legit rap beef or thin skin? By now you might have heard that Nicki Minaj bailed on a Sunday night concert appearance at the very last minute. But it wasn’t any old concert — it was Summer Jam, the annual hip-hop festival sponsored by New York’s Hot 97. Turns out, Minaj canceled after Hot 97’s Peter Rosenberg (who DJed at WMUC in College Park during his college days), said Minaj’s single “Starships” wasn’t “real hip-hop.” Lil Wayne, Minaj’s label boss, was insulted and pulled the plug on her headlining performance, leaving fans in the lurch. On Monday night, Minaj called in to the radio station for an hour-long conversation with Hot 97’s Funkmaster Flex in which neither side really offered an apology. The Star-Ledger has a handy recap.

View Photo Gallery: Nicki Minaj plays at DAR Constitution Hall on July 21. See more top summer concerts in the D.C. area.

●Washington’s Govinda Gallery remembers a day in 1994 spent with the late Adam Yauch of the Beastie Boys.

● In today’s Post, I review country vet Alan Jackson’s lovely 17th album, “Thirty Miles West”; Sarah Godfrey says New Orleans rapper Curren$y has emerged from the weed smoke with a disc to hang his hat on; Allison Stewart dives into the latest from Patti Smith; and Bill Friskics-Warren gets us reacquainted with the smart, tasteful ways of singer Kelly Hogan.

In case you missed it, our pop music coverage from earlier this week:

●Thom Yorke of Radiohead shook his proverbial groove thing at Verizon Center on Sunday night.

●Washington’s young jazz messengers are spreading the word via CapitalBop.