updated 02/08/2012 AT 1:00 PM ET
•originally published 02/09/2012 AT 10:00 AM ET
“She’s doing great,” a beaming Tina Knowles told PEOPLE at the Runway to Win fundraising reception for Barack Obama in New York. “She’s beautiful.”
As for her duties as a doting grandma, Knowles calls them “amazing,” adding, “It’s the second best job I’ve ever had.”
Although her adoration for the new addition to her family was certainly instantaneous, Knowles is waiting to decide which parent little Blue resembles most.