Rihanna 'man crush' Tom Hardy: Chris Brown's ex reveals 'MCM' on Instagram, but actor has a girlfriend! What happened to NFL star Mychal Kendricks?

Rihanna has designated Mondays "man crush" day. So, who's the lucky guy this week?

Popular English actor, Tom Hardy!

badgalriri: "Whoa it's almost Tuesday.... #MCM #tomhardy."

Unfortunately, the 36-year-old "Dark Knight Rises" hunk already has a serious girlfriend - actree Charlotte Riley:

(Reuters)

In fact, the couple got engaged back in 2010. Hey, RiRi can still have an innocent crush on the Hollywood hottie, right!?

Last week, the "Stay" songstress' MCM was NFL superstar Mychal Kendricks. Several fans refer to the Philadelphia Eagles linebacker as a Chris Brown lookalike - but with more muscles:

badgalriri: "Is it Monday? Cuz chhh.... #MCM."

Of course, this immediately ignited rumors that the two were dating. But that remains unconfirmed.

Which heartthrob will be RiRi's top choice next week?