"On the Horizon" is a song released by British singer-songwriter Melanie C. It was written by her along with Rick Nowels, Gregg Alexander, and produced by Nowels and Alexander for her second studio album, Reason (2003). Selected as the album's second single, the song reached number 14 on the UK Singles Chart. Melanie C performed the song during the Reason Tour.

Melanie Jayne Chisholm, professionally known as Melanie C or Mel C, is an English singer, songwriter, dancer, DJ, records businesswoman, actress, tv personality, fitness model and writer. As one of the five members of the Spice Girls, she was nicknamed Sporty Spice and throughout her career her combined sales surpass 135 million records. As a member of the group she released the biggest-selling debut single of all time with "Wannabe" and the biggest-selling album in music history by a girl group with Spice, becoming part of the best-selling girl group of all time with over 105 million records sold and of the second global cultural and media phenomenon after Beatlemania. As a band member she holds, together with The Beatles, the record for consecutive UK Christmas number ones, with three singles. She is considered by many critics as the vocal epicenter of the band thanks to her wide vocal range, vocal agility, impressive versatility and her unique and distinctive tone. Chisholm holds the current record of attendence for a free concert within a public event thanks to her show on a float, during the 2019 Global Pride Tour, in the streets of Sao Paulo in front of 3.7 million people.