Bodog Beat

Britney Spears and Justin Timberlake both made appearances last night at Dodger Stadium in L.A. for Madonna's Sticky and Sweet Tour.

People reports, "Madonna greeted her with 'Hi Britney!' And Spears, with her blonde hair flowing and red lips smiling, moved to the beat as she sang the last chorus on 'Human Nature' with Madonna.
'She's not your bitch' Madonna proclaimed, pointing at Spears who replied with her classic line: 'It's Britney, bitch!'

Madonna had to swing her around three times to get her to loosen up a little bit and, in a far cry from the 2003 smooch, kisses Spears on the hand as her platform sunk below the stage."

Timberlake later joined Madonna for their duet "4 Minutes."

Question: Does Madonna pretend to play the guitar? If so, why?