He was his charming self and had the room in fits.Carey - who wore a full-length ivory plain backless dress with V-straps, thought to be a Versace design - had eight bridesmaids, wearing turquoise knee-high prom dresses.Among the 200 guests at the rustic-themed celebration were celebrities including Sienna Miller and Carey's 'Brothers' co-star Jake Gyllenhaal.Carey - who previously dated 'Transfo