India, Sept. 1 -- Singer-songwriter Billie Eilish took to a special role as she officiated the wedding of her brother musician Finneas O'Connell and YouTuber Claudia Sulewski. The couple tied the knot in California on August 29 in an intimate celebration. Billie attended the wedding with her boyfriend, actor-singer Nat Wolff, while the guest list included celebrities such as Hailey and Justin Bieber, Kristen Bell, Nina Dobrev and Jason Sudeikis. Finneas and Claudia met through a dating app and tied the knot after eight years together. HTC...