And in some ways, some kids are always going to want to act older than they are, especially if they think it is cool, psychologists say.
It can be normal for kids to enjoy putting on a "more adult" role, says Judith Myers-Walls, associate professor of child development and family studies at Purdue University, but it's also important that children enjoy -- and are applauded for -- "being who they are now, not just for what they will become."
"If they do adult-like things earlier than most kids, what do they have to look forward to? What kind of dance moves will these girls add as they get older?" she asks.
Myers-Walls also points out that while the kids may love to dance, the choreography and the costumes are not designed by the children. "It's worth asking why the adults who work on this don't "create dances and costumes that celebrate childhood," she says.
The parents shouldn't necessarily "feel guilty" about this incident, Gardere says, because most likely "they didn't want to make their kids look like sexpots," but they should learn that there are "emotional implications to these kinds of things and be smarter next time."
Melissa Presch, mother of one of the 8-year-old dancers, emphasized in an interview with "Good Morning America" that the dance is something the parents are all very proud of, but Myers-Walls cautions that this pride needs to be unconditional.
"From their parents, [these girls] need unconditional love that is not based on whether they win competitions, look sexy in a fancy costume, or fall on their faces."