The singer recently hit a tourist hot spot -- and went totally unnoticed

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If you’re trying to spot Adele in London, look for the lady in the PJs. “I walked through Trafalgar Square on a Saturday afternoon — tourist haven — in pajamas,” the Grammy winner tells Matt Lauer in the upcoming NBC Adele Live in London special.

Even more shocking? The songstress was wearing color. “I’m always in black,” she says. “It was this tracksuit, with a massive green coat and little pink pumps. I had this massive umbrella so no one recognized me.”

The superstar says a few onlookers did do a double-take, but no one approached her. “A couple looked around, but they were like, ‘No … she’s in color and what would she be doing walking around a packed Trafalgar Square on Saturday in pajamas?'” she jokes.

During the special, Adele also speaks about her 2012 Grammy performance; it was her first time back onstage after her throat surgery, but she was thinking about more than just her voice. “I had three or four pairs of Spanx on that night,” she reveals, laughing. “I took a few pairs off when I sang, though.”

Hear more from Adele in the clip above, and catch the full NBC special on Tuesday, June 5, at 8 p.m. ET.

–Jennifer Cress