Is Britney Spears headed for rehab?

The “Oops, I Did It Again” singer reportedly checked into an exclusive spa “for some R&R” — and some are wondering if the a third “R” — rehab — is in store.

At a New Year’s Eve party, Spears passed out according to some reports, disputed by her rep, who insists that she just nodded off.

Spears quietly checked into Sanctuary, a spa in Arizona, on New Year’s Day, according to Life & Style weekly.

“With these celebrities, ‘exhaustion’ sometimes means something else and a little rest at a spa sometimes actually translates into something a little more serious,” says a source.

Spears’ rep couldn’t be reached for comment, but L&S reports that the singer’s parents are urging their daughter to go into therapy.

“It’s just been heartbreaking for her parents to watch Britney on this downward spiral,” an “insider” told the mag. “It’s so sad.”