Rita Ora was in great spirits last evening as she celebrates the success of her hit single ‘R.I.P’ at  London Club Whisky Mist.

Also at the event was rumored boyfriend Rob Kardashian, who fueled reports of a romance with Rita via a series of tweets.

“@RitaOra: WERE OFFICIALLY NUMBER1!!!!!! THANK YOU EVERYONE!!!!!! #RIPNUM1” you did it. i love you and you’re my wife,” Rob tweeted. He continued with a photo of the Roc Nation artist along with a caption, “That’s MY baby! @RitaOra.” He later tweeted again: “I love my woman! I’m so proud of you.”

‘R.I.P’ which features Tinie Tempah, is Rita‘s second number one hit this year. The single has sold over 105,000 copies last week.