Britney Spears wants her fans to know that their prayers have helped her during a difficult time.

"I am so blessed that you care enough about me to be concerned and will continue to live in this brighter state with all of you by my side during this trying time," she wrote in the letter posted Wednesday on her Web site.

"We are all the lights of the world and we all need to continually inspire others and look to the higher power," she added. "You are all in my prayers. Godspeed."

Her publicist did not immediately return an e-mail seeking comment.

The pop princess recently performed what were believed to be her first public concerts in nearly three years. Her musical comeback comes amid a tumultuous time in which she divorced aspiring rapper Kevin Federline, had a series of run-ins with the paparazzi and checked into rehab.

Get complete coverage in FOXNews.com's Britney Spears Celebrity Center.