Eminem's 2002 smash "Lose Yourself" tops the 4 million mark in digital sales this week. Only one other song that is that old has sold that many digital copies: Journey's 1981 smash "Don't Stop Believin'," which is up to 4,715,000. Both are anthems that offer inspiration, which explains their enduring popularity. "Lose Yourself" is Eminem's third song to reach the 4 million mark. It follows "Love The Way You Lie" (featuring Rihanna) and "Not Afraid." Only two other artists, Katy Perry and Lady Gaga, have amassed three or more 4-million sellers as lead artists. Perry has five. Gaga also has three.