Harper announced Hollingshead's commitment Monday.
The 6-foot-5 forward is a 2021 McDonald's All-American from Powder Springs, Georgia, and ranked No. 37 in the HoopGurlz top 100 by espnW.
Hollingshead played 20 games as a freshman for Georgia, averaging 5.1 points and 2.5 rebounds. She was limited by illness and injury but was a two-time SEC Freshman of the Week. She scored a season-high 15 points in the NCAA tournament against Dayton.
Tennessee has added 6-2 forward Rickea Jackson out of Mississippi State, 5-6 point guard Jasmine Powell out of Minnesota and 6-1 Missouri State graduate transfer Jasmine Franklin. Justine Pissott, a 6-4 guard-forward who is the No. 11 overall player in the 2022 class by espnW HoopGurlz, signed in November.