Britney Spears' former manager claims she has made her comeback too soon.

Johnny Wright - who has also worked with Janet Jackson, Justin Timberlake and the Jonas Brothers - insists Britney should not be attempting to resurrect her career yet, and should instead be concentrating on getting her life back on track, following her breakdown last year.

In 2008, these messes were so hot, they could be blamed for global warming. These celebrities were on the covers of tabloids, on the news, and in your water coolers but for all the wrong reasons. They tried to make them go to rehab (luckily, most said yes), and one was even on VH1's "Celebrity Rehab" with Dr. Drew. The public has spoken and has voted these 10 high-profile offenders as the Top 10 Celebrity Train Wrecks of 2008.

10. Lily Allen After her sunny 2006 debut album "Alright, Still," most of the hits Lily Allen has taken since then have been by the press.

Michael Jackson has ruled out a Jackson 5 reunion. It was reported earlier this week Michael and his brothers - Jackie, Tito, Jermaine, Randy and Marlon - were planning a world tour next year, for which they would be joined by their sister, "Together Again" singer Janet Jackson.

However, the "Thriller" singer has denied the rumors, insisting he wants to concentrate on his solo career.

Janet Jackson is suffering from vertigo and a "rare form of migraine."

The singer has been forced to cancel several dates on her "Rock Witchu" tour after falling ill while rehearsing for her show on September 29, but is now receiving treatment for the previously undisclosed illness.

Janet Jackson will resume her tour this weekend. The "Together Again" singer canceled a string of shows after falling ill with an undisclosed ailment, but has announced she is now ready to perform again.

A statement from Live Nation, who are promoting the "Rock Witchu" North American tour, read: "Janet, who has been under her doctor's care and recuperating over the last week, is excited about getting back on the road and again being able to share with her fans what she feels is one of her best stage shows ever."

Janet Jackson is thought to be suffering from "exhaustion." The "Feedback" singer, who was rushed to hospital after being taken ill during a sound check for a concert in Canada, had previously refused to comment on the reason for her illness.

But a close friend of the star's boyfriend Jermaine Dupri claims Janet is just very "tired".