According to Miranda Lambert, even country superstars have rummage sales.

This month Lambert is all about benefiting the MuttNation Foundation, from her Las Vegas auction to a second-hand sale in Tishomingo.

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Lambert recently referred to the sale on Instagram, where she posted a photo of her dog Bellamy "helping" her sort out the contents of her closet.

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The Pink Pistol is Lambert's boutique store, and her first business endeavor, located in Tishomingo, Okla. The singer's shelter work didn't end with the rummage sale though. She and husband Blake Shelton raised over $600,000 to help homeless dogs at the Route 91 Harvest Festival on Oct. 4. On Tuesday Lambert announced that she'd spent some time "glamping" and helping shelter pets find new homes.

Lambert hasn't just been making strides with her charity work. On Monday the single off Lambert's appropriately titled Platinum album Somethin' Bad actually went platinum. According to Taste of Country, the hit has sold over 1 million copies since it first came out back in May.

The full Platinum album was released June 3.