Photo by Max Morse // Getty Images

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Weekends are usually the time we sit back, relax, and get a little rest.  This wasn’t the case for superstar [lastfm link_type="artist_info"]Britney Spears[/lastfm]!

The pop singer had a jam-packed schedule, playing to packed crowds in Las Vegas and San Francisco. 

So is Britney back or did she underwhelm the audience? See for yourself!

It was a busy weekend in Vegas, with both [lastfm link_type="artist_info"]Lady Gaga[/lastfm] and Britney Spears taking the stage in various venues, but apparently this town’s big enough for the both of them!

Britney showed up as a surprise guest at The Palms on Friday night, but she gave her loyal Twitter followers a heads up:

I wonder who the special guest is? http://twitpic.com/4d6te2 -Britney—
Britney Spears (@britneyspears) March 25, 2011

It was all part of a taping for an upcoming MTV special, but we’ve got video of her performance right now!

But 1 concert just wasn’t enough for our beloved Brit Brit! 

She jetted over to San Francisco to tape her Good Morning America mini-concert that will air on Tuesday.

Were you impressed with Britney’s latest efforts to promote Femme Fatale, or is the pop princess we all know and love long gone? Vote in our poll!

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