Sam, who won last year's show, snapped the photos today (2 December) as Miley laid in her carry cot at home while giving the camera some seriously winning smiles!
The tot, who is almost three months old, is dressed in a cute Minnie Mouse outfit and seems to be having the best time looking up at her mum.
Posting the two pictures on Twitter, Sam told her followers: "Ok.....these have to be the cutest yet!! #smileymiley."
Last Thursday, Sam shared some more photos of Miley smiling but we have to agree, these could be even cuter!
Last year, former prison guard Sam was crowned the winner of The X Factor while Nicholas McDonald finished in second place and Luke Friend in third.
This weekend, Sam will return to the X Factor stage and perform a new song - but there's no need for the panel to judge her this time!
Sam will be joined by Idina Menzel, who sang 'Let It Go' in Frozen, and Simon Cowell's US X Factor protégées Fifth Harmony, who came third in 2012's US X Factor.