Yllana Marie Singin Aduana (Tagalog: [ɪlˈjɑːnə məˈriː əˈdwɑːnə]; born July 7, 1998) is a Filipino beauty pageant titleholder was crowned Miss Philippines Earth 2023.

[9] As Miss FIT Philippines, Aduana was announced as one of the 40 candidates competing at Binibining Pilipinas 2022, representing her home province of Laguna.

[17]At the end of the pageant on 29 April,[19] Aduana was named as the winner and was crowned by outgoing titleholder Jenny Ramp, as Miss Philippines Earth 2023.

[27] In pre-pageant activities, Aduana placed in the top five for Best Appearance and spoke on behalf of the delegates of Asia and Oceania in the Eco Project segment.

[28] During the preliminary rounds, Aduana wore a skin-bearing turquoise gown made of recycled zippers designed by Batino.

[29] For the National Costume round, Aduana wore a Partick Isorena ensemble inspired by the mythological figure Maria Makiling.

[31] At the pageant proper, Aduana ultimately advanced to the top four, where the finalists were asked if they agreed with an official at a "recent climate conference" who was quoted as "there is no science behind coals for the phaseout of fossil fuels".

[34][35] Aduana and her sister founded Edukasyon for Every Juan, a nonprofit organization that aims to promote environmental education.

[38] In an interview with Inquirer, Aduana revealed that she suffered from bulimia nervosa, and credits her participation in Miss FIT Philippines in helping her recover from the disorder.