Sia performs ‘The Greatest’ at iPhone7 launch

Tech giant Apple has unveiled the latest in their smartphone line, the iPhone7. Sans headphone jack, the iPhone7 is moving towards a "wireless" future for their products.

Apple described dropping the jack as an act of courage as it moved toward a wireless future with the optional Air Pods. Getting rid of the jack also increased room for stereo speakers, and Apple sharpened the technology on most features, from the camera to a pressure-sensitive home button to a boost in memory.

As proof that music is still an integral part of their design, singer-songwriter Sia performed her latest single "The Greatest" live for the first time at the launch of the iPhone 7, followed by her hit song "Chandelier."

A number of viewers have read "The Greatest" as a tribute to the victims of the attack on Pulse, a known LGBT club and haven in Orlando. The music video for the single shows 49 dancers, which some believe to correspond to the 49 people who lost their lives during the shooting incident.

Sia performed the song wearing a rainbow-inspired dress on the Apple stage while the video, hailed by The Atlantic as the best tribute to the 49 victims, played beside her. — Aya Tantiangco/RSJ, GMA News