The late Leslie Carter (married name Leslie Carter Ashton) died earlier this week.
While Leslie Carter's cause of death was an apparent overdose of prescription drugs, the 25-year-old's trouble with depression was a long time in the making.
It stemmed in large part from the fact that "She thought she would become the next famous Carter sibling," says a source who once managed her brothers.
In Leslie's case, although signed to DreamWorks Records, stardom eluded her.
Backstreet Boys singer Nick, of course, became very successful, as did younger brother Aaron. Leslie (below, right) felt great pressure to follow in their footsteps.
"She was always extremely happy for her brothers, don't get me wrong," says the source, in an interview with People magazine. "But it was tough for her."
According to sources close to the family, Leslie remained supportive of her brothers. At various family events, she would happily appear alongside them.
When all five siblings signed on for the E! show House of Carters, Leslie was an enthusiastic participant. "She really loved the attention," says the source.
But according to a police report, Leslie's stepmother, Ginger, stated that Leslie "had a history of mental illness and was on medication for her depression."
Life in the Carter family was nearly always chaotic.