The blonde beauty adores Una's three-month-old daughter Aoife Belle - her first child with fiancÃ© Ben Foden - but got nervous when she was left solely responsible for the tot.
Speaking at the WTA Pre-Wimbledon Party at The Roof Gardens in Kensington, London, on Thursday night (21.06.12), she said: ''I was looking after Aoife on my own, and although I was only looking after her for an hour I felt a bit panicked.''
Rather than looking for a new man, the 25-year-old singer insists she is enjoying being single and is in no rush to have another relationship.
Mollie told the MailOnline website: ''I'm young, and I'm having fun. I've only had long-term boyfriends. So I only go out with people I really like.''
Other stars in attendance at the glitzy bash included Kimberly Wyatt, Sugababes singer Heidi Range, rapper Professor Green and his girlfriend, 'Made In Chelsea' star Millie Mackintosh, and Tamara Ecclestone.