Fourth studio album by the American singer/songwriter. Featuring the singles 'Roar' and 'Unconditionally', the album debuted at #1 in the UK Albums Chart. The album also includes the tracks 'Walking on Air', 'This Moment' and 'Dark Horse' featuring Juicy J. Disc 11. Roar - Katy Perry (3.42)2. Legendary Lovers - Katy Perry (3.44)3. Birthday - Katy Perry (3.35)4. Walking On Air - Katy Perry (3.42)5. Unconditionally - Katy Perry (3.48)6. Dark Horse (Feat. Juicy J) - Katy Perry (3.35)7. This Is How We Do - Katy Perry (3.24)8. International Smile - Katy Perry (3.48)9. Ghost - Katy Perry (3.23)10. Love Me - Katy Perry (3.53)11. This Moment - Katy Perry (3.47)12. Double Rainbow - Katy Perry (3.52)13. By the Grace of God - Katy Perry (4.28)