Take a look at these photos from Saturday night's show in Boston, including some beautiful black-and-white shots from behind-the-scenes of the Circus tour. 

WARNING:

There have been recent sightings of internet auctions for fans to bid for a chance meet Britney. BritneySpears.com wants to warn fans about these fraudulent opportunities. These postings are fake. Fans would never be charged to meet Britney. The only meet and greets available for the Circus tour are through radio contests in select cities. Please be sure to listen to your local radio station to see if your city is eligible for a meet and greet. Do not bid for one online.

This afternoon, Britney and Q102 Philly gave away two tickets to tonight's show in Philadelphia via her Twitter.  Here's how it happened:

@britneyspears said:
What's up Philly? I'm hiding 2 ringside seats to my show tonight so follow me and @Q102Philly for clues!- Britney Pass to @Q102Philly

@Q102Philly said:
 Got you on my radar...looking for an Italian Stallion but not at the art museum this time

@britneyspears said:
If You want a piece of me, steak your claim on these ringside seats to my show especially if you're hungry...- Britney Pass to @Q102Phillyabout 7 hours ago from web

@Q102Philly said:
Show Rocco ur a whiz - meet him at his friend Geno's...be the first to tell him you'd like a BRIT WIT and you win Ringside tix!

@Q102Philly said:
We have a winner http://twitpic.com/fvlw0 for the britney vip passes

This week's featured fan remix is the spicy and spirited Club DJ Team Remix of Circus!