Consider the question. "Up the Ladder to the Roof" is a 1970 hit single recorded by The Supremes for the Motown label. It was the first Supremes single to feature new lead singer Jean Terrell in place of Diana Ross, who officially left the group for a solo career two weeks before the recording of this song in January 1970. This song also marks a number of other firsts: it is the first Supremes single since "The Happening" in 1967 to be released under the name "The Supremes" instead of "Diana Ross & the Supremes", the first Supremes single solely produced by Norman Whitfield associate Frank Wilson, and the first Supremes single to make the United Kingdom Top 10 since "Reflections" in 1967.

Answer this question based on the passage: who sings up the ladder to the roof?
What is the step-by-step reasoning process to arrive at the answer: The Supremes?
The relevant information is: "Up the Ladder to the Roof" is a 1970 hit single recorded by The Supremes for the Motown label.