Kailey Oliver-Machado was sentenced in November to 6½ years in a correctional facility, but Crown and defence lawyers argued over whether she should serve the time in prison or at a youth facility.
Justice Diane Lahaie had heard the arguments from both sides on Jan. 6, and said she needed more time to consider the decision.
Oliver-Machado, now 18, was arrested in 2012 when she was 15 for leading the operation with two other teens as they recruited other girls through sites like Facebook and Twitter before drugging and beating them, and forcing them into prostitution.
Oliver-Machado was the only to enter a not guilty plea,but she was found guilty this January.
The two other teens entered mid-trial guilty pleas in September 2013.
Though she was sentenced to 6½ years, she was given credit for time already served in pre-sentence custody, meaning she will only serve another two years and 325 days.