After giving a thorough and thoughtful interview to promote his upcoming performance at the 2013 Pittsburgh Pride festival, Adam Lambert took the stage at Pride in the Street (June 15). And brought a bit of confusion along with him.

During a long introduction to his song 'Fever,' Adam talked about the tune's roots and name-dropped Lady Gaga (who wrote it) -- and then he realized he'd misread his set list and wasn't supposed to be doing the song yet. Whoops.

As his band scrambled to make the last-second switch, Adam poked fun at himself, saying singing -- not reading -- was his forte, and the show went on. Albeit in a completely different order.

Meanwhile, Lambert's future plans include more collaborations with Queen -- at least according to the legendary group's guitarist Brian May. (As you'll recall, the Glam One has previously performed with Queen.)

"We are talking about doing something with Adam, probably for TV," May teased to MTV, saying of Adam, "He's an amazing artist and a very nice guy. We keep in touch and have a good friendship."

"We're not talking about touring yet, but we are talking about doing an event."

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