One lane is blocked and there's queueing traffic after an accident on the A470 Southbound at the A468 Caerphilly Road / A4054 (Nantgarw Interchange). There's congestion to the A4054 Cardiff Road / Gwaelod-y-garth Road (Upper Boat Interchange).
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The star celebrates beating Justin Bieber into second place as her song becomes a hit again after a performance at the total solar eclipse.
Later in the night cloud will thicken bringing hill fog, mist and some patchy drizzle by the early hours.
The Welsh singer sang her infamous track during yesterday's solar eclipse.