She was dressed in blue denim shorts, a long sleeve black top and white trainers.
Emergency services were called to the building on Market Street about 8am after the body was discovered.
Four men are now being interviewed by detectives.
Four men taken into custody on Sunday afternoon following an investigation into the death of a woman in a Melbourne apartment have been released without charge.
The group of men had travelled from the NSW and ACT for the party.
FAIRFAX MEDIA Forensic police enter hotel in central Melbourne where the woman's body was found
The rest of the guest have returned to Canberra.
Fairfax is reporting that one of the men woke up to find the woman, who has not been identified, dead in the shower this morning.
One of the men reportedly found the deceased woman in the shower.
Two of the men said they'd attended an AFL game on Saturday night before making their way to popular club Cloud 9, where they were seen partying until around 2:30 - 3am.
Initially the homicide squad was investigating, but police now say the woman's death was not suspicious and a report will be prepared for the coroner.More news: Public Barred from Whittier Fire Area