Pictures of Celebrities and Models on Twitter 2011-05-31 13:09:30

This week on Twitter, we caught a glimpse of celebrity Memorial Day celebrations — lounging poolside, traveling, and checking out the sights. We saw Olivia Wilde's charity work in Haiti, Rihanna touching up her hair, mermaid-style, and Victoria Beckham's little one taking a much-needed pool dip. Click through to see all of the fashionable moments!