The "Mr. Tambourine Man" album followed on June 21, 1965, peaking at number 6 on the "Billboard" Top LPs chart and number 7 on the UK Albums Chart. The album mixed reworkings of folk songs, including Pete Seeger's musical adaptation of the Idris Davies' poem "The Bells of Rhymney", with a number of other Dylan covers and the band's own compositions, the majority of which were written by Clark. In particular, Clark's "I'll Feel a Whole Lot Better" has gone on to become a rock music standard, with many critics considering it one of the band's and Clark's best songs. Upon release, the "Mr. Tambourine Man" album, like the single of the same name, was influential in popularizing folk rock and served to establish the band as an internationally successful rock act, representing the first effective American challenge to the dominance of the Beatles and the British Invasion.