Los Angeles: Singer Demi Lovato is missing the fun she recently had in Kenya as part of a charity trip.The 21-year-old went there as part of her association with a Canada-based charity, Free The Children, which works internationally to empower and enable youth to be agents of change, reports femalefirst.co.uk."Just had the most amazing week of my entire life. Words and photos will never be able to describe how incredible this was," Lovato posted on Twitter."Already itching to get back! Thank you so much free the children for solidifying the importance of my recovery and changing my life," she added.