Number Ones, Up Close and Personal World Tour was the sixth concert tour by American recording artist Janet Jackson. It showcased her sophomore compilation album, Number Ones and visited Asia, North America, Europe, Australia, and Africa. Jackson traveled to thirty-five different cities selected by fans, one chosen for each of her number one hits. The tour took an organic and intimate approach, excluding the elaborate theatrics and pyrotechnics her concerts have become infamous for, focusing on her musicality and choreography. Jackson explained the tour to be "different from anything I have ever done", adding, "These concerts are not about special effects. This is a love affair between me and those of you who have supported me and my work for all these years." Jackson dedicated an individual song to the audience during every show to commemorate each city.

Number Ones is the second greatest hits album by American singer Janet Jackson. It was released on November 17, 2009, by Interscope Geffen A&M Records and Universal Music Enterprises. The double-disc album is composed of 33 of her number-one singles on various music charts across the globe.