Britney Spears is so determined to make her gigs at Londonâ€™s O2 arena memorable sheâ€™s doing mountains of research.
The “Womanizer” singer kicks off an eight-night residency on June 3 and has been studying video footage of shows there.
She will also be sending aides to report back on upcoming gigs by Girls Aloud and the Pussycat Dolls.
A source backstage in Los Angeles at rehearsals for her The Circus tour said: â€œBritney knows these shows are absolutely crucial.”
The source added: â€œShe hasnâ€™t played in the UK for five years so there is a lot riding on them.â€