Sarah McLachlan in 1998. Her 2010 Lilith Fair tour has had to cancel dates. Lady Gaga, whose influence is pervasive among many female pop singers. (Photo: Steve Granitz/WireImage—Getty Images; Andy Paradise/Associated Press) Sincerity. I knew it was beleaguered but who knew it was on life support? The Sunday Times‘ Arts & Leisure above-the-fold article is […]