Lady Gaga and Colby O'Donis are American pop and R&B singer-songwriters who collaborated notably on the 2009 single "Just Dance (Remix)" and on O'Donis's own recordings; Lady Gaga, from New York City, is associated with synth-pop, dance-pop and electronic pop and emerged in the late 2000s as a high-profile solo artist known for theatrical presentation and a blend of club-oriented production with singer-songwriter elements, while Colby O'Donis, from New Jersey, is a vocalist and producer whose work spans pop, R&B and hip hop-influenced pop and who was active in the 2000s and 2010s contributing guest vocals and songwriting to mainstream pop releases.