Gigi Leung sang at Taipei Arena for the first time in more than 20 years, and friends in the circle helped cheer. Gigi Leung sang at Taipei Arena for the first time in more than 20 years, and friends in the circle helped cheer. Gigi Leung sang at Taipei Arena for the first time in more than 20 years, and friends in the circle helped cheer. Gigi Leung sang at Taipei Arena for the first time in more than 20 years, and friends in the circle helped cheer. Gigi Leung sang at Taipei Arena for the first time in more than 20 years, and friends in the circle helped cheer. Gigi Leung sang at Taipei Arena for the first time in more than 20 years, and friends in the circle helped cheer. Gigi Leung sang at Taipei Arena for the first time in more than 20 years, and friends in the circle helped cheer. Gigi Leung sang at Taipei Arena for the first time in more than 20 years, and friends in the circle helped cheer. Gigi Leung sang at Taipei Arena for the first time in more than 20 years, and friends in the circle helped cheer.