Prior to checking into treatment, Rimes was feted by her husband of 16 months during a romantic Tuesday night birthday dinner at posh sushi spot Nobu in Malibu, Calif. "They looked really happy and were talking a lot," an onlooker tells Us of the couple, who married in April 2011. "He was really animated and she was beaming." Rimes began celebrating her milestone birthday one week earlier during a beach bash August 21, tweeting several photos from the Don Julio tequila-sponsored party.
Turning 30 led Rimes to reflect fondly on the support system she has in her family and friends. "If there's one thing I know, it's that I'm loved," she tweeted. "Thank you all my family, friends and fans for all the birthday wishes!"
Hard at work on her latest album, Spitfire, Rimes is expected to perform concert dates in September during breaks from treatment.