Question: What year was the debut single of the singer of "3am (Pull Up)"?
Sentence (from "Charli XCX"): In April 2013, XCX released her major label debut album, "True Romance"; it contained a number of singles which were previously released, including "Nuclear Seasons", released in 2011, and "You're the One", released under Warner Music in 2012.
Relevant evidence: No