United Kingdom, Dec. 14 -- Britney Spears is "so proud" of Paris Hilton.

The Toxic hitmaker hailed her friend "such a stunning mom" and praised the 44-year-old socialite for allowing her the time and space to bond with her children Phoenix and London, both two, on a recent visit to the star's home.

Sharing a video of the tots - who Paris has with husband Carter Reum - Britney wrote on Instagram: "Paris is such a stunning mom. most moms act extremely weird and uncomfortable if you take real pleasure in bonding!!!!

"Good lord, I think the nanny was offended because I took over the room instantly. they didn't see her again for the next 6 hours!!!!

"My relationship with little Phoenix was quite intense he actually let me hold him forever ...