Lady Gaga Lets Side Boob Hang Out in Buenos Aires (PHOTOS)

Gaga's Pink 'do
See Gaga's new pink tresses during her Brazil trip
Celebrity Side-Boobs
Stars show off some sexy side cleavage
Lady Gaga is putting her breast — er, best — foot forward.

The pop star skipped a bra as she stepped out to greet fans in Buenos Aires, Argentina, on Wednesday. Taking a break from her usual eccentric, elaborate fashion, Gaga let it all hang out in a tight floral tank, paired with high-waisted denim and dark shades.

The singer is currently on the South American leg of her worldwide Born This Way Ball tour, in support of her second studio album, 2011’s Born This Way. “its amazing how small films i made became cult gems for you and even made there way to countries I’ve never been to,” she tweeted Thursday. “SA really is inspiring.”

While touring in Rio de Janeiro during her recent stop in Brazil, Mother Monster threw her star power behind a good cause — anti-bullying. The singer posed with fans who created t-shirts emblazoned with the message, “Bullying is for Losers.”

After she takes the stage in Argentina on Saturday, Gaga will play Chile and Peru before jetting to South Africa at the end of November.

When she heads back to North American in early January, Gaga promises to spice up the shows. “THE BORN THIS WAY BALL is getting a face-lift for America,” she tweeted. “I heard rumors @VERSACE IS CUSTOM DESIGNING ALL THE CLOTHES AND NEW LOOK.”

And even before fans enter the arena, they can get in the party spirit with Gaga’s pals. “#BTWBALL in America will have a tailgate gypsy party being thrown by @BREEDLOVENYC and @ladystarlightny EVERYDAY pre-show in parking lot,” she added.

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Tags: Lady Gaga