Yes, Mariah Carey is sporting a massive rock on her engagement ring. But does the diva realize it's possibly a hand-me-down? Mariah's new bling, a $2.5 million stunner made with rare pink and purple diamonds, looks suspiciously like the engagement ring her fiancé Nick Cannon gave to his last fiancée, Victoria's Secret model Selita Ebanks. An insider close to Selita even confirmed to perezhilton.com, "That is the same ring." If that's true, one can only imagine the deafening noise that five-octave-spanning voice is making right now.