Stop is overall a dance-pop and europop track. The first verse consists of a line for each of the girls to sing. The song then progresses on to the refrain with lyrics sung by Victoria and Melanie B. The chorus is next after that sung by all members but ends with Melanie C's line in the chorus. The next verse is sung by Emma and Melanie C. Then the refrain and chorus are repeated. A interlude is introduced with "Ba da da da, ba da da da..." The bridge is introduced thereafter with a quicker pace of lyrics than the previous parts of the lyrics. The chorus is then repeated three times after, with Melanie C doing backing vocals.