Jennifer Aniston

We spotted a solo (and extremely chipper) Jennifer Aniston at the Sunset Tower Hotel last night, and we're wondering what put her in such a great mood. Was it her delish dinner at the Terrace restaurant? Her picture perfect tresses? Perhaps she was reminiscing about her recent trip to the Bahamas with John? Whatever the reason may be, it's nice to see the actress looking so happy and vivacious!

We know Jen and John aren't always joined at the hip - they seem to go for long periods of time without seeing each, yet they still manage to make their relationship work.

So what's their secret? The other day, when asked by The Daily Mail if there was such a thing as a perfect relationship, Jen responded, "I don't have one, and I don't think it exists. We are just fooling ourselves if we think it does."

Sooo...being honest and having realistic expectations are what keep these two together?