In reply to Shady 81.

I'm not too sure about that. If the featured act on a single doesn't get credit for it's peak, then why would 'Diamonds' count for Janet as one of her R&B Billboard #1's (it's 1 of her 16)? It's the same with 'What's It Gonna Be' by Busta Rhymes (which she also featured on), it's 1 of her 16 #1's on her R&B tally. interesting enough, that song also counts as 1 of Janet's 27 top 10 Hot 100 hits. Rihanna is featured on Eminem's 'Love the Way You Lie' and 'The Monster' and both songs are counted as 1 of her 13 chart-toppers. Jay Z has 4 #1 singles on the Hot 100 and only one as a lead artist.

Btw, Luther shared equal lead status with Janet on 'Best Things in Life are Free'. When you see & or "with" where performers are listed it doesn't include either artists as a feature artists. Other examples of that are: Brandy with Monica (Boy is Mine), Mariah Carey with Boyz II Men (One Sweet Day), Salt N Pepa with EnVogue (Whatta Man), Beyonce with Shakira (Beautiful Liar), Whitney with Mariah (When you Believe) and Britney Spears with Iggy (Pretty Girls).