Miley Cyrus and Justin Bieber got dinner at Ari-Ya Sushi in West Hollywood on Monday night. When asked if they were doing a CD together Justin sarcastically replied "Maybe" and then later Miley said "It's for a side project." When asked if Justin was having fun with Miley he said, "She's having fun with me."It will be interesting to see what this side project is, if there really is one. Miley and Justin are probably the two biggest teen stars right now, so any project they did together would be huge.