NEW VIDEO: Nick Carter Pays Tribute To Sister Leslie During NYC Concert

Check out this video of Nick Carter performing “Falling Down” in NYC Thursday night, two days his sister Leslie Carter died of an apparent drug overdose.

“I’ve never done this before, and I never thought I’d ever have to, but I’d like to dedicate this song to my sister,” Carter told the crowd.

JUST IN: Leslie Carter Autopsy ‘Inconclusive’….Family Suspects Overdose

An autopsy on Nick Carter‘s sister Leslie was inconclusive, but her family suspects a drug overdose is the culprit.

“There were no visible signs of trauma,” coroner Richard Mackowiak said. “We are awaiting a toxicology report to determine a cause of death … Results of the toxicology test are made public at the discretion of the family.”

But sources tell TMZ Leslie struggled with prescription medication addiction, and they suspect that she may have died of an overdose. Leslie recently moved from Toronto to nearby upstate New York so she can be closer to family and beat her addiction.

Leslie, who died Tuesday at 25, leaves behind her husband Mike and her daughter Alyssa Jane, who was born in April 2011.

JUST IN: Aaron Carter Speaks About Sister’s Death

Aaron Carter has broken his silence about the death of his sister Leslie.

“I am with my family spending much-needed time together as we deal with this private matter,” Aaron said in a statement. He will also not be performing for the time being in his off-Broadway show.

“I look forward to returning to my Fantasticks Family and performing the role of ‘Matt’  for all my amazing fans,” he said. “I request privacy for my family and no further statements will be made at this time.”

Nick Carter, Aaron Carter Receive Celebrity Condolences From Lohans, Lance Bass, Jordan Knight & More

A slew of celebrities have come out to offer their condolences to Nick and Aaron Carter, following the mysterious death Tuesday of their sister Leslie, 25:

Lance Bass: “Thoughts and prayers for my boys @aaroncarter and @nickcarter.”

Jonathan Knight: “Thinking of Nick Carter and the entire Carter family.”

Dina Lohan: “The Lohan family sends there love to the Carter family xo”

Russell Simmons: “Sending my thoughts and prayers to the Carter family.”

Naughty by Nature “Condolences to our homies Nick Carter & Aaron Carter on the loss of their sister. R.I.P. Leslie Carter.”

Backstreet Boys: “Our hearts are with @nickcarter…RIP Leslie Carter…We will definitely send @nickcarter all your condolences and love.”

JUST IN: Nick Carter Speaks About Sister Leslie’s Death

Following the death of his 25-year-old sister Leslie on Tuesday in New York, Nick Carter is breaking his silence.

“Performing is cathartic to me and I am dedicating the rest of my tour to my sister since she loved to watch me perform,” Nick wrote on his Web site, confirming that he will continue with his tour.

His rep added, “Nick Carter is thankful to the many people and the fans who have shared their wishes and prayers during this tragic time. We want to let the fans know the tour will go on as promised. Also, we ask that the press respects Nick’s privacy during his time of grief.”