Rome: Singer Nicole Scherzinger and her boyfriend Grigor Dimitrov were recently spotted shopping for rings. "The X Factor" judge looked thrilled as she tried bands on her left hand. She was measured up and onlookers were left wondering whether an engagement might be in the air, reports mirror.co.uk. Scherzinger, 38, and the tennis ace, 25, were at the exclusive Gold For Ever jewellery store in Portofino, Italy. The shop boasts on its website that celebrity clients have included Rod Stewart, Hugh Grant and Ringo Starr. Former Pussycat Dolls singer Scherzinger looked thrilled as she and Dimitrov left the jewellers, kissed and headed off for a meal and a bottle of white wine. An onlooker said: "They looked totally enthralled in each other's company and only had eyes for each other." They got together last year after she finally split from Formula One star Lewis Hamilton, and after Dimitrov's romance with fellow tennis star Maria Sharapova ended.