Jeez, what took her so long. It’s not like she doesn’t have 26 million Twitter followers or anything, gawking at the pictures she posts. In her quest for social media dominance, Lady Gaga has finally joined Instagram, the photo sharing service that Justin Bieber and Rihanna can’t seem to get enough of. Lookout, Biebs and RiRi! Gaga is ready to become the queen of yet another digital space. She’s coming for the crown.