The emergence of Twitter has given us a great peek into the lives of our favorite stars thanks to their celebrity Twitter accounts. Fans also tweet celebrity sightings and stories all the time, though sometimes they are cases of mistaken identity. Today, there are rumors that Robert Pattinson and Kristen Stewart were seen out kissing and sharing cigarettes at a pub after the Burberry Fashion Week event yesterday. This week, the two were spotted together leaving the BAFTAs and there was also the questionable quote from him about the relationship. Still, last night's sighting of Rob and Kristen unfortunately doesn't have photographic evidence yet. So tell us — do you believe Twitter rumors about celebrities?