  We suggest that the uncertain state $f_X(1500)$ observed by Belle and BaBar
more than a decade ago, which has been viewed as a single scalar or a
combination of several even spin resonances, is the vector $\rho^0(1450)$
reported recently by LHCb. Adopting the perturbative QCD approach, we determine
the di-kaon distribution amplitudes with the $\rho^0(1450)$ resonance from the
LHCb data for the quasi-two-body decays $B^{\pm}\to
\pi^{\pm}\rho^0(1450)\to\pi^{\pm}K^+K^-$. It is then shown that the $B^+ \to
K^+K^+K^-$ decay spectrum around the invariant mass $M(K^+K^-)\sim 1.5~\rm GeV$
measured by BaBar can be well described by the resonant contribution from
$\rho^0(1450)$. The broad structure in the $B^{+}\to K^{+} K_SK_S$ spectrum
around the invariant mass $1.5~\rm GeV$ of a $K_SK_S$ pair, which
$\rho^0(1450)$ cannot decay into because of Bose-Einstein statistics, can be
accounted for by a nonresonant $S$-wave contribution alone. The branching
fractions and/or the direct $CP$ asymmetries of the $B^{\pm}\to
\pi^{\pm}\rho^0(1450)\to\pi^{\pm}K^+K^-$, $B^{+}\to K^{+}\rho^0(1450)\to
K^+K^+K^-$ and $B^{0}\to K^{0}\rho^0(1450)\to K^0K^+K^-$ modes are predicted,
which can be tested at the ongoing LHCb and Belle-II experiments. We encourage
experimental colleagues to scrutinize our postulation by analyzing relevant
data with higher precision.
