Britney Spears’ former backup dancer Teresa Espinosa is speaking out after Kevin Federline’s cheating allegation .

In an excerpt from his forthcoming memoir, “ You Thought You Knew ,” Federline — who was married to Spears from September 2004 to July 2007 — claims the Princess of Pop cheated on him with Espinosa in 2004.

Espinosa — who “had the lovely honor of dancing for and with” Spears during the “In The Zone” era that launched the Onyx Hotel Tour — took to Instagram Thursday to defend her.

“At the time (2003 to 2004), I felt the chaotic energy that was Britney’s life just by being in proximity to her,” Espinosa recalled.

“Paparazzi were in full effect everywhere she went. She couldn’t breathe or sneeze without someone trying to capture a moment of her beautiful soul.”

Espin

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