Hip-hop, R&B, pop, country, and rock were all under one roof on Tuesday (Dec. 8). Stars like Mariah Carey, Rihanna, Ciara, 50 Cent, Young Jeezy, Mary J. Blige, and Justin Timberlake mingled with Taylor Swift, Adam Lambert, Sheryl Crow, John Mayer, and Shania Twain at the star-studded launch for premium music video website VEVO at Skylight Studio in New York City.

Executives including Doug Morris, L.A. Reid, Tommy Mottola, and Clive Davis showed off their newest venture, while Lady Gaga entertained the high-profile crowd with “Speechless” and Q-Tip DJ’d.