There are at least 2 artists with this name.
1. Platnum are a three-piece bassline vocal group from Manchester, UK, consisting of male vocalist Aaron Evers and female vocalists Mina Poli and Michelle McKenna. The group formed for a local talent show, Urban Superstars, in around 2004. They did not win the competition, but used their entry track, Over the Heartache, to showcase their talents to established members of the UK Bassline scene. The track proved popular, and a remix, by DJ Jamie Duggan, was awarded Bassline Heaven's Tune of the Year Award in 2006. Nocturnal records released the track, on vinyl, in the same year.
The trio are best known for providing the vocals on H "Two" O's 2008 single, "What's It Gonna Be", which reached number two in the UK Singles Chart in February 2008. Platnum, who formed around 2004, have worked with DJs Jamie Duggan and Q as well as producers Virgo, H "two" O and Nastee Boi.
The groups highly anticipated second single, "Love Shy (Thinking About You)" was released on 29 September 2008 and they have also started work on their debut album.
2. Miss Platnum, formerly known as Platnum, is a Romanian singer, songwriter and musician, currently signed to Four Music.
Platnum (Ruth Maria Renner) was born in Timişoara, Romania in 1981. At the age of eight her family relocated to Berlin where she went to school in Berlin-Lichterfelde. Later on she took lessons in singing with Jocelyn B. Smith and worked as a background singer for Moabeat.
After her minor successful debut album Rock Me which was released in January 31st 2005 on the Berlin-based Indie label Sonar Kollektiv Platnum released her second album Chefa in May 2007, under her new artist name Miss Platnum. Through a mixture of Hip-Hop, Soul, R&B, Pop and Romanian Musical elements it distinguished itself, it was produced by Die Krauts. Its lead single, “Give Me the Food” reached the top 20 of the Romanian single charts, and made her chart debut with a position of 63 on the German Media Control chart.