But in May of that year, whilst on tour, Brian collapsed with hepatitis, and the band had to cancel the rest of their dates.

Work on their third album began without Brian and with a lot of help from Roy Thomas Baker. Brian finally felt well enough to go into the studios to record his guitar parts, although he was still ill and spend much time between takes in the studio bathroom being very sick! But eventually, the album was finished, and "SHEER HEART ATTACK" was released in November 1974. It was a huge hit both sides of the Atlantic as the world came to realise that Queen were certainly a force to be reckoned with!

In January 1975, Queen left for the USA on their very first headlining tour. Ticket sales were phenomenal, and demand was so high that they had to add more shows, doing two shows in one day at some venues, both shows being sold out. Quite a few shows on that tour had to be cancelled, as Freddie had developed a severe throat problem, but he soldiered on and performed as many as possible, although doctors had advised him against it. Also in January 1975, Queen engaged the services of a Music Business lawyer, Jim Beach, to negotiate them out of their Trident agreements, as Trident were no longer being as supportive as they should have been, and the band were unhappy with the situation. Their first Canadian gig was in Edmonton on April 2nd, where they were joined on stage by support act Kansas. April of '75 saw Queen set to pay their first-ever visit to Japan. When they arrived at the airport, there were over three thousand fans there to greet them, as Sheer Heart Attack was Number One in Japan at the time. It was a scene reminiscent of Beatlemania in the Sixties, and the band were quite surprised at their 'pop star' welcome! In May 1975, Freddie was presented with an Ivor Novello Award by the Songwriters Guild for "Killer Queen".

Queen began work on their new album in June. Links with Trident were finally severed - to the band's great relief - in August, and by September Queen had signed with new management: enter John Reid. When the band decided to release Bohemian Rhapsody in 1975, everyone told them it was far too long and just would not be a hit at 5 minutes and 55 seconds. But Freddie gave a copy of the single to friend and London DJ Kenny Everett, informing him that it was for him personally, and that he must not play it on air. But of course he did - fourteen times in two days!! From then on, every major radio station played the song in full, and not edited versions as was first thought. It was a colossal hit, and really established Queen as THE band of the era.