I enjoy several of Janet's hits from 1986's "Control" to 1993's "Janet" like "What Have You Done For Me Lately", "Control", "Nasty", "Miss You Much", "Rhytmn Nation", "Black Cat", "If", and "Anytime, Any Place". Though not much of her later material and "Feedback" has to be the worst I've heard. Though have to admit that she's much better than another female pop "superstar" from the past 25 years.
Only been to one concert, which was Natasha Bedingfield with Veronicas & some generic female folk singer a few months ago. It was great and even got to get an autograph from Natasha Bedingfield.

Not really interested in concerts since there isn't much out there and also they tend to be pricey.
Thought about Fergie, but I only like a few of her songs and I don't think I would want to listen to "Weird Al" Yankovic for two hours. He's funny, but only in small doses. Also would rather not go into a mosh pit...