It was announced at the start of the month that the reformed girl-group would be cutting short their world tour, playing the last show on February 26 in Toronto.
Speaking about the band's final concerts, she said: "I feel a mixture of sadness and joy. I know it's time to come home yet I will miss everyone from the tour."
Commenting on 3-year-old Cruz Beckham's performance onstage with the group at Madison Square Gardens earlier this week, she added: "Victoria's son Cruz was a little star.
"We all had our children up on stage tonight and Cruz started break dancing! How cool is that? It's clearly in the family."