The singer – a founding member of Destiny's Child – was in London Wednesday night at the LG Scarlet TV launch party promoting her remix album, Miss Kelly: Diva Deluxe.
But she could not be tempted to discuss her BFF's April 4 wedding, which she attended.
"I just spoke to Beyoncé last night, and she is very happy," Rowland – who is already hard at work on her third solo album – told PEOPLE at the LG Scarlet TV launch party.
So married life is treating Knowles well? "How do you know there's been a wedding?" she replied playfully. "This is something you need to ask Beyoncé and Jay."
Reporting by MARIANA GREBLER