On "Friends," Rachel gets a heart tattoo on her hip. The tattoo appears in season 2’s episode "The One Where Joey Moves Out," when Rachel and Phoebe decide to visit a tattoo parlor together.
Rachel hesitates because Ross disapproves of tattoos and worries that she is making a permanent decision under pressure. Phoebe encourages her by arguing that Rachel should make her own choices. Rachel ultimately goes through with it and gets a small heart tattooed on her hip.
Phoebe plans to get a lily in memory of her mother, whose name is Lily, but panics when she realizes that tattooing involves needles. She backs out and ends up with only a tiny blue dot, which she jokingly describes as the Earth seen from far away—or as her mother sees it from heaven.
The heart is sometimes confused with a tattoo Jennifer Aniston got in real life, but Rachel’s tattoo is a fictional character detail. It is also rarely mentioned again in the series, making it an easy detail for viewers to forget.