Whitney Houston's refusal to fasten her seatbelt on a flight yesterday (12.10.11) has been blamed on exhaustion.

The troubled star - who has battled alcohol and cocaine addictions in the past - was almost kicked off a Delta Airlines flight in Atlanta, Georgia, when she refused to buckle up before the plane took off, despite warnings from staff onboard but pals have insisted she is still clean and sober and was merely "exhausted".

Whitney Houston was almost kicked off a flight for refusing to fasten her seatbelt.

The troubled star - who has a history of substance abuse problems - boarded a Delta Airlines flight in Atlanta, Georgia, yesterday afternoon (12.10.11) and was told by a crew member to buckle up before the plane took off.

David Gest, Tito Jackson, Rebbie Jackson are to pay tribute to Michael Jackson with a live tour honoring the pop icon's life.

The TV star and producer will be joined by the late singer's two siblings and Gary, Indiana-born singer Deniece Williams - whose hits include 'Let's Hear It For The Boy', 'Free' and 'Too Much Too Little Too Late' - for a series of spoken word and music shows which will reveal never-before-told details about him and his phenomenal career.

Dolly Parton would duet with Jack White.

The country music star is a big fan of the musician - whose former band the White Stripes covered her hit 'Jolene' - but insists she never collaborates with anyone for purely commercial or financial reasons.

Whitney Houston is seeking help for drug and alcohol problems.

The 47-year-old singer - who has a history of substance abuse issues - voluntarily entered an out-patient rehab program around 10 days ago, her spokesperson has confirmed.

Whitney Houston is to return to the big screen for the first time in 15 years.

The 47-year-old singer-and-actress - who has battled alcohol and cocaine addictions in the past - will be reuniting with her former 'Waiting To Exhale' castmates to create a sequel to the 1995 hit movie, in which she played unlucky-in-love television producer Savannah Jackson.