Britney Spears launched a sneak peek to her latest video 'I Wanna Go' which shows the pop star taking out paparazzi with her microphone. The star also promised to show an excluseive 30-second preview of the video on Bravo's 'Watch What Happens: Live' at 11 PM tonight.

And in true Britney style, her new tour 'Femme Fatale' kicked off last week with elaborate costumes, lots of dancing and piercing screams from the audience.

Whether you love or hate her music, there is no denying that the arguably most famous pop star (in the world) still has the power to attract millions of viewers and screaming fans. described the show as her flashiest, fastest moving, and most entertaining production yet.

The night belonged to Britney: She managed to prove that she's still progressing as a showgirl. Not only that, she's doing it better than even die-hard defenders would've predicted.

With 'Grease' inspired choreography, the song 'How I Roll' Britney looks like she's having a blast on stage with her dancers.

Britney also revives 'If You Seek Amy' and channels Marilyn Monroe with a Monroe-esque costume. Britney has publicly stated that she is a fan of Monroe, and when Tommy Hilfiger purchased three pairs of the late actress's jeans, Hilfiger gifted a pair to Britney who is the same height that Monroe was.

It seems Britney is aware that fans want to not only hear her latest music, but take a trip down memory lane with the music which made the pop star famous. Britney sings (live) her old ballad, 'Don't Let Me Be the Last to Know,' which was released in 2001 on her 'Opps! . . .I Did It Again' album. The song was written by Robert Lange, country singer Shania Twain and Keith Scott.

The singer also dances in cut-off jeans to 'Womanizer.'

In other pop news, Selena Gomez is apparently stoked at having the opportunity to sing 'Whiplash,' a song co-written by Britney.

The 'Who Says' singer will also pay tribute to Britney with a medley of Brit's songs during the tour, including some off the 'Femme Fatale' album. Gomez told that she is 'stocked' about the tribute. We're gonna do 'Baby One More Time,' and then I think we're going to try to incorporate 'Toxic' and that phase, and we might do some of her recent new stuff.

But Gomez blushed when asked if she is going to do any of Britney's dances and said, I don't think so, I'm not even going to touch Britney like that. I wouldn't butcher it. I'm just going to [do a] tribute to her because she's awesome.

Watch the 'I Wanna Go' teaser. Tell us what you think of the song and teaser in the comments below.