The former Atomic Kitten singer and her husband Vicente 'Vinnie' Juan Spiteri welcomed daughters into the world on Sunday and the pair are smitten with the tiny tots, reported Femalefirst.
"Good morning, Our girls are here..... Blake and Nico arrived on Sunday night. They are perfect... Tiny but perfect!! (sic)," she posted on Twitter.
Frost, 34, already has a five-year-old son, Casper, from a previous relationship.