According to Wikipedia, between March, 12 2009 (the first show of her first tour) and May 6, 2011 (the announced last date of her second tour) Lady Gaga will have done 274 shows (of course, assuming...
If your talking about My Fair Lady, Eliza was acted by Audrey Hepburn and her singer was Marni Nixon, Henry Higgins was both acted and sung by Rex Harrison Eliza's father Mr Doolittle was both acted...
Many actors and actresses have played the lead roles. The most famous are perhaps Audrey Hepburn as Eliza Dolittle and Rex Harrison as Professor Higgins in the 1964 film