Kathleen Veronica Belsten (born 22 February 1993), better known by her online aliases Loserfruit, Fruity, and Lufu, is an Australian Twitch live streamer, YouTuber, professional gamer, and internet personality.

[7] She was one of the leading streamers to compete in the inaugural Fortnite Summer Smash tournament to be hosted at the Australian Open in 2019, and attended the second edition in 2020 as well.

Belsten was a member of Click, a since-disbanded group of Australian YouTubers who collaborated on videos that also included LazarBeam, Muselk, Crayator, Bazza Gazza, Tannar, Mully, Fresh and her boyfriend Kilner Marcus Brasier (former owner of the prestige clips youtube channel[11]).

She led a 36 hour-long charity stream in January 2020 with Crayator and Fasffy that raised just over A$318,000 for the Australian bushfire relief effort, in which many other members and friends of Click also participated.

Belsten started her second YouTube channel known as "Lufu" on 24 September 2016 where she mainly made vlogs of her day-to-day life, often in a humorous manner.