HUMBERTO CARRENO / StarTraks 1 / 7
HUMBERTO CARRENO / StarTraks 1 / 7

Rihanna sparked controversy on Tuesday, July 15 when she posted a '#FreePalestine' message on her Twitter account and promptly deleted it.

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Unfortunately, the "Umbrella" singer's 37 million followers and various news outlets picked up the note during the eight minutes it was up on the micro-blogging site.

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A source tells, "She deleted it because it was never meant to be tweeted. She didn't even realize it was a tweet until she started hearing from her fans."

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The source claims Rihanna was reading about the Middle East conflict online when she clicked a link.