Destiny's Child introduced the R&B world to rapid-fire singing, which has since become Beyoncé's trademark. She has exemplary phrasing and is renowned for her enviable ability to 'ride any beat' (Upgrade U, No No No, Run the World), demonstrating her extensive knowledge of melody, pitch and timing.
Clearly inspired by the likes of Mariah, Beyoncé often uses melisma to great effect. She intonates remarkably well, using it to express a particular mood or emotion ('Emotions', 'Resentment').
Breath control is another area in which Beyoncé excels, the best example of it arguably being the extended roulades on the unreleased Next Ex (as well as the expertly-growled melismatic runs on I Care) and pitching. She can also scale upwards and downwards with accuracy and is able to transition between registers seamlessly and with ease (I Care guitar solo, from chest to head and vice versa; Irreplaceable at Glastonbury - E5 to F#5, a strong belt to a bright, resonant head note). This is yet another example of her good support and technique.
Some of y'all just really want her voice to be destroyed. lol #pathetic.com