Demi Lovato's new romance with Wilmer Valderrama heatsup as they step out together at Disney co-star's wedding

And Mrs. Congrats to the new Mr.

Her management reached a financial settlement with Welch last December.

A representative for Demi, who is now mainly concentrating on her singing, last month would notcomment on the reports of Demi and Willmer.

Earlier today, the star was dressed down in a more casual ensemble of T-shirt, baggy cardigan,tracksuit bottoms and boots as she arrived at LAX to catch a flight out of town.

On the move again: Demi looked a lot more dressed down as she arrives at LAX to catch a flight outof Los Angeles today

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Flower girl: A delighted Demi brandishes the bouquet after catching it at the wedding reception

Tweetcatch: Demi took to her Twitter account to congratulate the happy couple and reveal her delight atcatching the bride's bouquet

It has been reported that she went for treatment after punching Jonas Brothers back-up dancer AlexWelch on a flight out of Bogotá, Colombia. ME!!!!!'

The singer was first linked to Wilmer last year after splitting with former boyfriend Joe Jonas lastMay.

At 31, he is 12 years older than Demi and is said to count Mandy Moore, Ashley Simpson andLindsay Lohan among his former loves.

Demi looked happy and healthy after a difficult year - last October she entered treatment for eatingdisorders and bipolar disorder and it was reported that she completed treatment in January thisyear. Ps....

By Eleanor Gower

Updated: 10:52 GMT, 16 November 2011

Earlier this month, they sparked rumours of a romantic reconciliation after they were spotted kissingin Los Angeles.

And it seems things between Demi Lovato and her former boyfriend Wilmer Valderrama are well andtruly back on, as they attended a friend's wedding together at the weekend.

Demi, 19, was one of the bridesmaids at her Disney co-star Tiffany Thornton's wedding toChristopher Carney, a court officer on Saturday.Â

Newromance: Demi Lovato happily poses next to her date at the Saturday wedding of her Disney co-starTiffany Thornton in Arkansas

Tiffany, 25, and Demi both appeared in The Disney Channel's TV show Sonny With A Chance.

And the singer looked stunning in a short purple one shouldered dress designed by Max Azira, whichshe teamed with black high heels.

She and Willmer, an actor best known for his role in sitcom That 70s Show, looked particularly closeas they linked arms to stroll out of the church following the ceremony.

The look of love: The couple looked close, linking arms as they walked out of the church together,while Demi earlier walked down the aisle alone

Willmer was acting as one of the groomsmen for the nuptials and wore a grey suit, black shirt andpurple and white sneakers.

Demi was one of eight bridesmaids who were dressed in a variety of purple mini dresses, while thebride wore a strapless creation with ruffled skirt, also designed by Max Azira.

She also joined her rumoured new boyfriend at the reception, held at the Hot Springs Museum ofContemporary Art.

And Demi was delighted to catch the bride's bouquet and posed for a photograph showing herholding the pretty purple blooms aloft.Â

Celebration: The wedding party celebrate as Tiffany and her groom Christopher Carney share a kissoutside the church

Purplepassion: Tiffany posed in the opulent strapless white gown alongside her eight bridesmaids outsidethe church

She even took to her Twitter account to announce her catch, writing: 'Had such an amazing day....Chris Carney. Guess who caught the bouquet.....

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