Rihanna: J.R. Smith has been 'hungover from clubbing' during playoffs

Pop singer and noted club-goer Rihanna is saying what a lot of New York Knicks fans have been suspecting during J.R. Smith's playoff struggles — the Knicks sixth man has been hungover from clubbing.

In a comment on Instagram, the singer alleges that Smith is struggling because “his a** be hungover from clubbing every night during playoffs.” Smith has shot just 28.6 percent from the field since Game 5 of the first round series against the Celtics. The Knicks are down 3-1 and facing elimination heading into Game 5 of the Eastern Conference semifinals vs. the Pacers.

Before being suspended for elbowing Celtics guard Jason Terry in Game 3 of the first round, Smith seemed fine, shooting 48 percent, including 4-of-9 from 3-point range. Last week, Rihanna and Smith were pictured partying at Greenhouse, a club in Manhattan and it's been downhill ever since.

The two were rumored to be dating last year. Rihanna appeared to be replying to someone commenting on one of her photos when she outed Smith’s hard-partying exploits, reports The New York Post.

The full text read: “f--- you and your wack a** team!! Nobody want that desert thirsty n----!! He f----- up cus his ass be hungover from clubbing every night during playoffs!!”

The comment has since been deleted.

The Knicks and Pacers play Game 5 at Madison Square Garden Thursday night. Don't count on seeing Rihanna sitting in the celebrity seats behind the Knicks bench.