Rock superstar Pink made a surprise appearance at a Glasgow nightclub.

The American superstar, who is in Glasgow for two massive shows at Hampden on Saturday and Sunday, watched Los Angeles singer songwriter Wrabel perfrom an intimate set at the Attic in The Garage in Sauchiehall Street.

Glasgow Times: Glasgow - September 4:  Donald MacLeod who owns the Garage nightclub which this year celebrates its 20th anniversary poses for a picture September 4, 2014 in Glasgow.   (Photo by Mark Mainz).

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The international superstar joined around 60 guests at the show.

Wrabel has dueted with Pink on the song '90 days' which he performed as Pink watched on.

She sat cross legged on the floor in the centre of the small hall in amongst the small audience.

The star watched on as Stephen Wrabel perfomed the song, written by him, on his own.

Glasgow Times:

He said it had "changed his life" and he was "so grateful".

In a silver bomber jacket and cowboy hat, Pink spent most of the hour long set on Friday night sitting in with the small crowd before leaving with two staff just before the show ended.

Read more: Pink more train seats added for Hampden

Pink plays two nights on her Beautiful Trauma tour at Hampden, after a second date was added.

Saturday was her first live show in the UK since 2013.