Exclusive: Martha Wainwright has written the tell-all we've been waiting for

• Martha Wainwright knows you want to ask about her famous family – everybody does. And after a lifetime of fielding curious questions about her mom and aunt, Canadian folk icons Kate and Anna McGarrigle, her dad, American singer-songwriter Loudon Wainwright III, 75, and her brother, baroque pop star Rufus Wainwright, 48, she's finally ready to dish with new memoir Stories I Might Regret Telling You. RELATED: Avril Lavigne opens up about her new album, incredible career and what she misses most ab