Miley got one.
Selena just had 3 top 10 hits (and 3 #1 radio hits) from the same album, is a social media queen, beauty icon and keeps getting bigger and bigger, her tour is doing great too. I think she can get one #1 next album. She's totally on top of the game right now.
Demi is still here, so she's doing fine too. Body Say is a great song. Next album will be great for her I think
Love her, but Christina only had great single peaks her first era because she was one of like 3 artists still releasing CD singles. Sales vs. no sales made a HUGE difference.