Did Kenyon Martin also party with Rihanna?

No, but Martin has caught J.R. Smith’s flu. Smith and Martin missed yesterday’s practice at Bankers Life Field House to rest at the hotel and Knicks coach Mike Woodson is worried about the bug spreading.

Smith came down with a virus Friday night, had a 102-degree fever Saturday and played at less-than-full-strength in the Knicks’ 82-71 Game 3 loss to the Pacers. Smith shot 4 of 12, scored nine points, had low energy on defense and looked like a zombie on the bench.

“Kenyon is kind of coming down with it too,’’ Woodson said. “So we got to be careful this doesn’t spread and other guys start dropping. So we kept them back in the hotel.’’

Martin played 20 minutes Saturday, scoring eight points with seven rebounds. His minutes dropped slightly to make room for Amar’e Stoudemire’s grand return.

Despite Smith’s viral infection, Woodson played him nearly 25 minutes. After the game, Smith, sounding congested, but said he definitely will play in Game 4 tomorrow as the Knicks’ medical staff will infuse him with a slew of antibiotic medications.

“It was so-so,’’ Woodson said of Smith’s Game 3 performance. “You expect that. That’s why I didn’t play him a whole lot of minutes. ... We got to hope the next two days he gets some energy back. We desperately need his offense.If I can’t get it, we have to keep mixing and matching and trying to find it.’’