Rihanna Disses Beyonce with 'Bow Down' Jab on Instagram? RiRi Deems Queen Bey 'Money, Fame, Power Hungry' with Shirley Manson Quote?

Pop songstress Rihanna is known to openly express her mind and opinion... especially on the popular social networking website, Instagram. Recently, the "Diamonds" beauty "liked" a post quoting Garbage's lead singer, Shirley Manson. The message claims that several celebrities are so "money, fame, and power" hungry, that they expect everyone else to simply BOW DOWN to them. Hmm, was this an (un)intentional diss aimed at the Queen of the Game, Beyonce?

Here's Manson's full quote:

"A lot of celebrities just want money, fame, power, fancy cars, houses all over the world and have people BOW DOWN to them. To me, that's frightful behaviour."

And here's "photographic" evidence of RiRi's "liking" the post,as reported by MediaTakeOut.

Back in March, Rihanna tweeted this:

@rihanna: “I only know how to be number 1!! I could use a challenge… ‘How dat feel down there on ya knees, Huh?!... It’s only March people… #2013isalreadyowned #staytuned #MoneyOvaB*tchez.”

So RiRi likes some "friendly" competition... that doesn't mean she's totally dissing Beyonce. Perhaps she simply likes the Shirley Manson quote, and it has nothing specifically to do with the mentioning of "bow down." Still... what do fans think?