Backstreet Boys star Nick Carter skipped his sister Leslie's funeral to perform at a pre-scheduled gig as part of his multi-city solo tour.

Aspiring singer Leslie Carter was laid to rest on Sunday at the Chautauqua County Cemetery.

Her older brother Nick decided to honour his previously booked engagement at the iHeart Performance Studio in Bala Cynwyd, PA Sunday evening instead of heading to his sister's services taking place seven hours away, reported Us magazine.

This is Nick's third performance since Leslie passed away from a drug overdose on February 1 at the age of 25.

On Monday, the 32-year-old addressed his absence from his sister's services, saying, "I wanted to be at my sister's funeral, but my family has always had a complicated dynamic. There are so many emotions for me surrounding the loss of my sister. I am trying to stay healthy, positive, and focused."

Sources close to TMZ say that Nick feels his family went out of their way to make sure that he was not included.

On the day of his sister's death, a statement was released on his website, which read: "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," with Nick adding, "Performing is cathartic to me and I am dedicating the rest of my tour to my sister since she loved to watch me perform."