11.   Around the clock, parades and impromptu concerts keep packed streets alive.

12.   During the longest rain delay, an impromptu pop concert kept the fans entertained on Centre Court.

13.   Guitars, tambourine and balalaika, a triangle-shaped, banjo-like instrument, make it an impromptu concert.

14.   Impromptu concerts of saxophones, bongos and guitars set a backdrop to bursting firecrackers and the din of canned fog horns.

15.   Last year, the British singer gave an impromptu concert on Centre Court that had several women players joining in a chorus line.

16.   On Wednesday a knighted pop star and three former Wimbledon champions gave an impromptu pop concert on Centre Court during a rain delay.

17.   Sir Cliff played Centre Court Wednesday with three former Wimbledon champions in an impromptu pop concert on a sopping wet day at the All England Club.

18.   Ten years after his impromptu concert in front of the collapsing Berlin Wall, cellist Mstislav Rostropovich is coming back for an encore.

19.   There was a live show with the band for a select crowd at the Sony Music Studios, and an impromptu concert at a Manhattan club video shoot.