She posted a message to her fans on Twitter, explaining: "Want to say thank u to my UK loves for my first no 1 over there with problem! I so wish I could be there to celebrate. I'm sorry I had to cancel my trip especially given the circumstances. I love you so much."
She added: "was too much to fit in one tweet! thank u so much UK, just heard the news today.... love u more than words...adding on to that... i'll try my hardest to reschedule my trip out there! can't thank u enough for ur understanding during this time. love u"
On July 4 she tweeted: "love u grandps i need u please pull thru" and has been sharing pics of her family by his side in the hospital. Ariana's news resulted in the Twitter hashtag #PrayforGrandpaGrande, as fans showed their support for the singer and her grandfather. On July 3rd, she answered a fan about his condition, writing: "the update is his cancer is at bay but the treatment (chemo + radiation) really took a toll on him...he's havin a lil trouble"
We hope he makes a speedy recovery and totally understand why she would want to be with him right now.