We have long known Selena Gomez to be a low-key Vanderpump Rules fan. This week, she revealed herself to be quietly obsessed with another reality show: Shark Tank. The singer's friends surprised her with a Shark Tank-themed birthday present, and Gomez posted her happy freakout on Instagram. "Not many of you know but I am obsessed with shark tank. Two of my best friends nailed my gift 😁," Gomez wrote.