Britney Spears had the support of her nearest and dearest on the opening night of her of her world tour in New Orleans, according to reports.

The pop princess - who pulled out all the stops with multiple racy costume changes and spectacular circus-themed stunts - was welcomed by the support of family and friends on Tuesday.

"Britney's whole family was there, her parents, [sister] Jamie Lynn, [brother] Bryan, his wife, her cousins [including] Laura Lynn [Covington], friends from Kentwood – everyone thought it was a fantastic show and she just nailed it," a source tells People.

Adds the source: "They all thought Britney was so amazing – her energy, her spirit.

"The show was completely sold out and it was just incredible. Britney was just really happy."

Rumour has it that ex-husband Kevin Federline banned their two boys Sean Preston and Jayden James from seeing Brit's sexually-charged show, but her baby daddy showed his support by making an appearance.

See Britney dazzle in New Orleans below