Christina Aguilera\u2019s little Mouseketeer is growing up so fast! The singer and Voice coach's fianc\u00e9, Matthew Rutler, enjoyed a daddy-daughter day at Disneyland with the couple's 1-year-old, Summer Rain. \r\nWATCH: Christina Aguilera's Spontaneous Duet With \u2018Voice\u2019 Hopeful Joe Maye Will Blow Your Mind\r\n Decked out in a striped Minnie Mouse T-shirt with matching shoes, the adorable tot flashed a big smile while she rode the carousel as her proud papa lovingly held her. \u201cDisney,\u201d Rutler captioned the Instagram post on Sunday. Aguilera, 35, welcomed her first daughter on Aug. 16, 2014. Summer has a big brother, 8-year-old Max, from Aguilera's marriage to Jordan Bratman. \r\nWATCH: Christina Aguilera Kisses a Female 'Voice' Contestant on the Lips and Pharrell Loses His Mind\r\n "She's precious. She's so adorable, she's really, really good and has big bright blue eyes," the pop singer told ET in February 2015 about her daughter. "It's like looking into her soul." Last summer, Aguilera gave us a peek at her adorable family with some personal footage from an outing at the L.A. Zoo. To see the home video, watch below.