Justin Timberlake has been keeping a low profile for quite some time now. The pop superstar of the noughties had all but withdrawn from the public eye in recent years. Most recently, the NSYNC singer involuntarily hit the headlines in October when his name came up in the tell-all book of his ex-girlfriend Britney Spears. The 43-year-old singer is now stepping back into the spotlight, and after co-releasing a comeback single last year, he’s now set to launch his sixth solo album on March 15. Timberlake told Jimmy Fallon’s “Tonight Show” in January that he spent four years working on “Everything…