PARTIESPhotos: Solange Shuts Down the Spring BallAt the annual Society of Memorial Sloan Kettering event.by Vanessa Lawrence05.13.151Solange. Photo by BFAnyc.com.2Aerin Lauder and Lauren DuPont. Photo by BFAnyc.com.3Dayssi Kanavos. Photo by BFAnyc.com.4Jamee Gregory and Peter Gregory. Photo by BFAnyc.com.5Muffie Potter Aston. Photo by BFAnyc.com.6Shoshanna Gruss. Photo by BFAnyc.com.7Tory Burch. Photo by BFAnyc.com.8Barbara Cirkva and John Schumacher. Photo by BFAnyc.com.