Barack Obama -- Beyonce's Ears Could Win Him the Election

If you like it, then you shoulda put earrings on it -- at least that's what Beyonce did with a brand new pair of Barack Obama hoops last weekend ... and now, TMZ has learned, sales for the pro-bama jewelry have EXPLODED.

The earrings were designed by a Puerto Rican jewelry designer named Erika Peña -- and up until last week, she had only sold 5 sets of the handmade earrings.

But her fortune changed overnight when Beyonce wore them last Saturday in NYC. Since then, Erika tells TMZ, she's sold over 1,300 PAIRS!

Erika tells us she received orders almost immediately from all over the world -- England, Switzerland, Chile, and Argentina ... with her biggest order coming from London.