United Kingdom, April 14 -- Britney Spears is being warned to follow a structured post-treatment plan after entering rehab.

Experts are saying she risks "falling apart" without continued support after the troubled 44-year-old singer checked herself into a treatment facility following a DUI charge on 4 March, with her representative confirming the move to Page Six.

She is due to appear in court on 4 May over her alleged DUI incident.

Britney is said to have entered treatment voluntarily after being taken into custody when authorities observed her swerving between lanes and allegedly discovered an unknown substance in her car.

She was released the following morning.

Sources cited by Page Six said she was "ashamed and embarrassed" and v...