Episode 3 of "Hannah Montana"
s01e03 She's A Supersneak

After being told that she can't go to the premiere of Ashton Kutcher's new movie because she has to stay home and study by her dad, Miley is convinced to sneak out of the house and go to the premiere by Lilly and Oliver. Little does she know though that Jackson has the exact same idea except he's going to meet girls. Once they get there, both Miley and Jackson are surprised to see their dad there, and get an even bigger surprise when they realize that he's on a date with a real estate agent named Margo Diamond. Miley is extremely upset that Robbie would even try to replace her mother that died three years ago, so she decides to go down to the real estate agent's office dressed as Hannah Montana to try to find out a little bit about this lady their dad is dating.