Some of Springfield's biographers and journalists have speculated that she had two personalities: shy, quiet, Mary O'Brien, and the public face she had created as Dusty Springfield. An editorial review at Publishers Weekly of Valentine and Wickham's 2001 biography, Dancing with Demons, finds that "the confidence [Springfield] exuded on vinyl was a facade masking severe insecurities, addictions to drink and drugs, bouts of self-harm and fear of losing her career if exposed as a lesbian".[145] Simon Bell, one of Springfield's session singers, disputed the twin personality description: "It's very easy to decide there are two people, Mary and Dusty, but they were the one person.