Snooki has joked her unborn baby is ''already applying lipstick''.

The reality TV star - real name Nicole Polizzi - shared a sonogram picture of her second child in the womb with her followers today (19.05.14) and joked she is already applying make-up, as her hand is close to her mouth.

She wrote: ''My baby girl! She's healthy and look, she's already applying lipstick #mygirl.''

The former 'Jersey Shore' star's daughter will be her second with fiance Jionni LaValle, joining their 20-month-old son, Lorenzo.

The 26-year-old star - whose best friend and 'Snooki and JWoww' co-star Jenni Farley is also expecting, with her fiance Roger Mathews - has previously said she is much more active with her pregnancy this time around, which is making her feel much better about herself.

She said: ''My first pregnancy I didn't do anything. I just sat and ate on the couch and I was literally a whale - I slept 24 hours [a day]. And I was so negative and hated life cause I just didn't feel good at all.

''With this pregnancy I'm working out and eating healthy and just way active - so I just feel better about life.''

'Snooki and JWoww' is set to return for a fourth season later this year, which will document the pair's dual engagements and pregnancies.